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f*x=(3*x^4-4*x^3-5*x+12)/x la ecuación

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v

Solución numérica:

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Solución

Ha introducido [src]
         4      3           
      3*x  - 4*x  - 5*x + 12
f*x = ----------------------
                x           
$$f x = \frac{\left(- 5 x + \left(3 x^{4} - 4 x^{3}\right)\right) + 12}{x}$$
Gráfica
Respuesta rápida [src]
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         ||                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  /              /               2            3                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |     ||                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  /              /               2            3                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 /              /    /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                               106   4*f                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |     ||                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 /              /    /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                               106   4*f                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                /              /     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                             - --- - ---                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |     ||                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                /              /     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                             - --- - ---                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               /     8        /      \  27    9 /    \  3   3/    \  3   3/ \27   27/    4*f                                         27    9                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |     ||                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               /     8        /      \  27    9 /    \  3   3/    \  3   3/ \27   27/    4*f                                         27    9                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              /      - + 2*3 /     - ------------- - ---------- + -------------------  + --- + ---------------------------------------------------------------------------------                                                                                                                                                                                                                                                                                                                                                                                                                                                            |     ||                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              /      - + 2*3 /     - ------------- - ---------- + -------------------  + --- + ---------------------------------------------------------------------------------                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                                         _________________________________________________________________________           /       9     \/              8            108                3              9            _________________________________________________________________________                                                                                                                                                                                                                                                                                                                                                                                                                                                            |     ||                                                                                                                                                                                                                                                                                                                                                                                                                                         _________________________________________________________________________           /       9     \/              8            108                3              9            _________________________________________________________________________                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                                        /              ____________________________________________________                 /                                                                                         /              ____________________________________________________                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |     ||                                                                                                                                                                                                                                                                                                                                                                                                                                        /              ____________________________________________________                 /                                                                                         /              ____________________________________________________                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                                       /              /               2            3                                       /                                                                                         /              /               2            3                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |     ||                                                                                                                                                                                                                                                                                                                                                                                                                                       /              /               2            3                                       /                                                                                         /              /               2            3                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                                      /              /    /  53   2*f\    /  2   f\    /  2   f\ /92   f \                /                                                                                         /              /    /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |     ||                                                                                                                                                                                                                                                                                                                                                                                                                                      /              /    /  53   2*f\    /  2   f\    /  2   f\ /92   f \                /                                                                                         /              /    /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                                     /              /     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|               /                                                                                         /              /     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                                                                                                                                                                                                                                                                                                                                                                                                               2    |     ||                                                                                                                                                                                                                                                                                                                                                                                                                                     /              /     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|               /                                                                                         /              /     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                                                                                                                                                                                                                                                                                                                                                                                                               2    |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                                    /     4        /      \  27    9 /    \  3   3/    \  3   3/ \27   27/    2*f       /                                                                                         /     4        /      \  27    9 /    \  3   3/    \  3   3/ \27   27/    2*f                                                                                                                                                                                                                                                                                                                                                                                                                                               /  2   f\     |     ||                                                                                                                                                                                                                                                                                                                                                                                                                                    /     4        /      \  27    9 /    \  3   3/    \  3   3/ \27   27/    2*f       /                                                                                         /     4        /      \  27    9 /    \  3   3/    \  3   3/ \27   27/    2*f                                                                                                                                                                                                                                                                                                                                                                                                                                               /  2   f\     |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                                   /      - - 2*3 /     - ------------- - ---------- + -------------------  + ---      /                                                                                         /      - - 2*3 /     - ------------- - ---------- + -------------------  + ---                                                                                                                                                                                                                                                                                                                                                                                                                                               |- - - -|     |     ||                                                                                                                                                                                                                                                                                                                                                                                                                                   /      - - 2*3 /     - ------------- - ---------- + -------------------  + ---      /                                                                                         /      - - 2*3 /     - ------------- - ---------- + -------------------  + ---                                                                                                                                                                                                                                                                                                                                                                                                                                               |- - - -|     |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                             1   \/       9     \/              8            108                3              9     \/                                                                                        \/       9     \/              8            108                3              9                                                                                                                                                                                                                                                                                                                                                                                                                                      92   f    \  3   3/     |     ||                                                                                                                                                                                                                                                                                                                                                                                                                             1   \/       9     \/              8            108                3              9     \/                                                                                        \/       9     \/              8            108                3              9                                                                                                                                                                                                                                                                                                                                                                                                                                      92   f    \  3   3/     |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                             - - --------------------------------------------------------------------------------- - ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------                                                                                                                                                                                                                                                                                                                                                                                                                               for -- - -- + ---------- = 0|     ||                                                                                                                                                                                                                                                                                                                                                                                                                             - - --------------------------------------------------------------------------------- - ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------                                                                                                                                                                                                                                                                                                                                                                                                                               for -- - -- + ---------- = 0|
         ||                                                                                                                                                                                                                                                                                                                                                                                                                             3                                           2                                                                                                                                2                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         27   27       12        |     ||                                                                                                                                                                                                                                                                                                                                                                                                                             3                                           2                                                                                                                                2                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         27   27       12        |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |     ||                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
         ||                                                                                                                                                                                                                                                                                                                                                                                                           ___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________                              |     ||                                                                                                                                                                                                                                                                                                                                                                                                           ___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________                              |
         ||                                                                                                                                                                                                                                                                                                                                                                                                          /                  __________________________________________________________________________________________________________________________________________________                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |     ||                                                                                                                                                                                                                                                                                                                                                                                                          /                  __________________________________________________________________________________________________________________________________________________                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
         ||                                                                                                                                                                                                                                                                                                                                                                                                         /                  /           ___________________________________________________________________________________                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |     ||                                                                                                                                                                                                                                                                                                                                                                                                         /                  /           ___________________________________________________________________________________                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
         ||                                                                                                                                                                                                                                                                                                                                                                                                        /                  /           /                                                     2                           3                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |     ||                                                                                                                                                                                                                                                                                                                                                                                                        /                  /           /                                                     2                           3                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
         ||                                                                                                                                                                                                                                                                                                                                                                                                       /                  /           /  /              2            3                      \    /                2     \                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          /                2     \                                                                                                 |     ||                                                                                                                                                                                                                                                                                                                                                                                                       /                  /           /  /              2            3                      \    /                2     \                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          /                2     \                                                                                                 |
         ||                                                                                                                                                                                                                                                                                                                                                                                                      /                  /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |       /  2   f\      |                                                                                                 |     ||                                                                                                                                                                                                                                                                                                                                                                                                      /                  /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |       /  2   f\      |                                                                                                 |
         ||                                                                                                                                                                                                                                                                                                                                                                                                     /                  /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |       |- - - -|      |                                                                                                 |     ||                                                                                                                                                                                                                                                                                                                                                                                                     /                  /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |       |- - - -|      |                                                                                                 |
         ||                                                                                                                                                                                                                                                                                                                                                                                                    /                  /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                                                                                                                                        106   4*f                                                                                                                                                                                                                                                    |  92   \  3   3/    f |                                                                                                 |     ||                                                                                                                                                                                                                                                                                                                                                                                                    /                  /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                                                                                                                                        106   4*f                                                                                                                                                                                                                                                    |  92   \  3   3/    f |                                                                                                 |
x1 = I*im|<                                                                                                                                                                                                                                                                                                                                                                                                   /                  /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                                                                                                                                      - --- - ---                                                                                                                                                                                                                                                  2*|- -- - ---------- + --|                                                                                                 | + re|<                                                                                                                                                                                                                                                                                                                                                                                                   /                  /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                                                                                                                                      - --- - ---                                                                                                                                                                                                                                                  2*|- -- - ---------- + --|                                                                                                 |
         ||                                                                                                                                                                                                                                                                                                                                                                                                  /         8        /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/    4*f                                                                                                                                                                                  27    9                                                                                                                                                                                                                                                     \  27       12       27/                                                                                                 |     ||                                                                                                                                                                                                                                                                                                                                                                                                  /         8        /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/    4*f                                                                                                                                                                                  27    9                                                                                                                                                                                                                                                     \  27       12       27/                                                                                                 |
         ||                                                                                                                                                                                                                                                                                                                                                                                                 /          - - 2*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------  + --- + ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- + ---------------------------------------------------------------------------------------------------------------------------------------------------------------                               |     ||                                                                                                                                                                                                                                                                                                                                                                                                 /          - - 2*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------  + --- + ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- + ---------------------------------------------------------------------------------------------------------------------------------------------------------------                               |
         ||                          _____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________                         /           9     \/          \/                                   4                                         27                     16           216                6              9                          _____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________                __________________________________________________________________________________________________________________________________________________                               |     ||                          _____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________                         /           9     \/          \/                                   4                                         27                     16           216                6              9                          _____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________                __________________________________________________________________________________________________________________________________________________                               |
         ||                         /                  __________________________________________________________________________________________________________________________________________________                                                                                                                                                                                                 /                                                                                                                                                                                                             /                  __________________________________________________________________________________________________________________________________________________                                                                                                                                                                                        /           ___________________________________________________________________________________                                                                                   |     ||                         /                  __________________________________________________________________________________________________________________________________________________                                                                                                                                                                                                 /                                                                                                                                                                                                             /                  __________________________________________________________________________________________________________________________________________________                                                                                                                                                                                        /           ___________________________________________________________________________________                                                                                   |
         ||                        /                  /           ___________________________________________________________________________________                                                                                                                                                                                                                                                    /                                                                                                                                                                                                             /                  /           ___________________________________________________________________________________                                                                                                                                                                                                                                           /           /                                                     2                           3                                                                                    |     ||                        /                  /           ___________________________________________________________________________________                                                                                                                                                                                                                                                    /                                                                                                                                                                                                             /                  /           ___________________________________________________________________________________                                                                                                                                                                                                                                           /           /                                                     2                           3                                                                                    |
         ||                       /                  /           /                                                     2                           3                                                                                                                                                                                                                                                    /                                                                                                                                                                                                             /                  /           /                                                     2                           3                                                                                                                                                                                                                                           /           /  /              2            3                      \    /                2     \                                                                                     |     ||                       /                  /           /                                                     2                           3                                                                                                                                                                                                                                                    /                                                                                                                                                                                                             /                  /           /                                                     2                           3                                                                                                                                                                                                                                           /           /  /              2            3                      \    /                2     \                                                                                     |
         ||                      /                  /           /  /              2            3                      \    /                2     \                                                                                                                                    /                2     \                                                                                        /                                                                                                                                                                                                             /                  /           /  /              2            3                      \    /                2     \                                                                                                                                    /                2     \                                                                               /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                     |     ||                      /                  /           /  /              2            3                      \    /                2     \                                                                                                                                    /                2     \                                                                                        /                                                                                                                                                                                                             /                  /           /  /              2            3                      \    /                2     \                                                                                                                                    /                2     \                                                                               /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                     |
         ||                     /                  /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                                                                    |       /  2   f\      |                                                                                       /                                                                                                                                                                                                             /                  /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                                                                    |       /  2   f\      |                                                                              /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                      |     ||                     /                  /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                                                                    |       /  2   f\      |                                                                                       /                                                                                                                                                                                                             /                  /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                                                                    |       /  2   f\      |                                                                              /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                      |
         ||                    /                  /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                                                                     |       |- - - -|      |                                                                                      /                                                                                                                                                                                                             /                  /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                                                                     |       |- - - -|      |                                                                             /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                |     ||                    /                  /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                                                                     |       |- - - -|      |                                                                                      /                                                                                                                                                                                                             /                  /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                                                                     |       |- - - -|      |                                                                             /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                |
         ||                   /                  /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                               |  92   \  3   3/    f |                                                                                     /                                                                                                                                                                                                             /                  /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                               |  92   \  3   3/    f |                                                                            /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                |     ||                   /                  /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                               |  92   \  3   3/    f |                                                                                     /                                                                                                                                                                                                             /                  /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                               |  92   \  3   3/    f |                                                                            /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                |
         ||                  /                  /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                             2*|- -- - ---------- + --|                                                                                    /                                                                                                                                                                                                             /                  /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                             2*|- -- - ---------- + --|                                                                           /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/                                |     ||                  /                  /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                             2*|- -- - ---------- + --|                                                                                    /                                                                                                                                                                                                             /                  /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                             2*|- -- - ---------- + --|                                                                           /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/                                |
         ||                 /         4        /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/    2*f                                                                        \  27       12       27/                                                                                   /                                                                                                                                                                                                             /         4        /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/    2*f                                                                        \  27       12       27/                                                                      3*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------                                |     ||                 /         4        /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/    2*f                                                                        \  27       12       27/                                                                                   /                                                                                                                                                                                                             /         4        /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/    2*f                                                                        \  27       12       27/                                                                      3*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------                                |
         ||                /          - + 2*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------  + --- - ---------------------------------------------------------------------------------------------------------------------------------------------------------------                /                                                                                                                                                                                                             /          - + 2*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------  + --- - ---------------------------------------------------------------------------------------------------------------------------------------------------------------      \/          \/                                   4                                         27                     16           216                6                                         |     ||                /          - + 2*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------  + --- - ---------------------------------------------------------------------------------------------------------------------------------------------------------------                /                                                                                                                                                                                                             /          - + 2*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------  + --- - ---------------------------------------------------------------------------------------------------------------------------------------------------------------      \/          \/                                   4                                         27                     16           216                6                                         |
         ||               /           9     \/          \/                                   4                                         27                     16           216                6              9                 __________________________________________________________________________________________________________________________________________________               /                                                                                                                                                                                                             /           9     \/          \/                                   4                                         27                     16           216                6              9                 __________________________________________________________________________________________________________________________________________________                                                                                                                                                                                                  |     ||               /           9     \/          \/                                   4                                         27                     16           216                6              9                 __________________________________________________________________________________________________________________________________________________               /                                                                                                                                                                                                             /           9     \/          \/                                   4                                         27                     16           216                6              9                 __________________________________________________________________________________________________________________________________________________                                                                                                                                                                                                  |
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         ||      /                                                                                                                                                                                                3*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------       /                                                                                                                                                                                                             /                                                                                                                                                                                                3*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------                                                                                                                                                                                                   |     ||      /                                                                                                                                                                                                3*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------       /                                                                                                                                                                                                             /                                                                                                                                                                                                3*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------                                                                                                                                                                                                   |
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         ||- - ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- - ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------           otherwise          |     ||- - ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- - ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------           otherwise          |
         \\3                                                                                                                                                                                    2                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             2                                                                                                                                                                                                                                                                                                                                                                                                        /     \\3                                                                                                                                                                                    2                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             2                                                                                                                                                                                                                                                                                                                                                                                                        /
$$x_{1} = \operatorname{re}{\left(\begin{cases} - \frac{\sqrt{\frac{2 f}{9} - 2 \sqrt[3]{\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}} + \frac{4}{9}}}{2} - \frac{\sqrt{\frac{4 f}{9} + \frac{- \frac{4 f}{9} - \frac{106}{27}}{\sqrt{\frac{2 f}{9} - 2 \sqrt[3]{\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}} + \frac{4}{9}}} + 2 \sqrt[3]{\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}} + \frac{8}{9}}}{2} + \frac{1}{3} & \text{for}\: - \frac{f}{27} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} + \frac{92}{27} = 0 \\- \frac{\sqrt{\frac{2 f}{9} - \frac{2 \left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)}{3 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}}} + 2 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}} + \frac{4}{9}}}{2} - \frac{\sqrt{\frac{4 f}{9} + \frac{- \frac{4 f}{9} - \frac{106}{27}}{\sqrt{\frac{2 f}{9} - \frac{2 \left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)}{3 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}}} + 2 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}} + \frac{4}{9}}} + \frac{2 \left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)}{3 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}}} - 2 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}} + \frac{8}{9}}}{2} + \frac{1}{3} & \text{otherwise} \end{cases}\right)} + i \operatorname{im}{\left(\begin{cases} - \frac{\sqrt{\frac{2 f}{9} - 2 \sqrt[3]{\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}} + \frac{4}{9}}}{2} - \frac{\sqrt{\frac{4 f}{9} + \frac{- \frac{4 f}{9} - \frac{106}{27}}{\sqrt{\frac{2 f}{9} - 2 \sqrt[3]{\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}} + \frac{4}{9}}} + 2 \sqrt[3]{\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}} + \frac{8}{9}}}{2} + \frac{1}{3} & \text{for}\: - \frac{f}{27} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} + \frac{92}{27} = 0 \\- \frac{\sqrt{\frac{2 f}{9} - \frac{2 \left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)}{3 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}}} + 2 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}} + \frac{4}{9}}}{2} - \frac{\sqrt{\frac{4 f}{9} + \frac{- \frac{4 f}{9} - \frac{106}{27}}{\sqrt{\frac{2 f}{9} - \frac{2 \left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)}{3 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}}} + 2 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}} + \frac{4}{9}}} + \frac{2 \left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)}{3 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}}} - 2 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}} + \frac{8}{9}}}{2} + \frac{1}{3} & \text{otherwise} \end{cases}\right)}$$
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         ||                                                                                                                                                                                                                                                                                                                                                                                                                                          /      - + 2*3 /     - ------------- - ---------- + -------------------  + --- + ---------------------------------------------------------------------------------                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |     ||                                                                                                                                                                                                                                                                                                                                                                                                                                          /      - + 2*3 /     - ------------- - ---------- + -------------------  + --- + ---------------------------------------------------------------------------------                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                                         /       9     \/              8            108                3              9            _________________________________________________________________________            _________________________________________________________________________                                                                                                                                                                                                                                                                                                                                                                                                                                                           |     ||                                                                                                                                                                                                                                                                                                                                                                                                                                         /       9     \/              8            108                3              9            _________________________________________________________________________            _________________________________________________________________________                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                                        /                                                                                         /              ____________________________________________________                  /              ____________________________________________________                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |     ||                                                                                                                                                                                                                                                                                                                                                                                                                                        /                                                                                         /              ____________________________________________________                  /              ____________________________________________________                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                                       /                                                                                         /              /               2            3                                        /              /               2            3                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |     ||                                                                                                                                                                                                                                                                                                                                                                                                                                       /                                                                                         /              /               2            3                                        /              /               2            3                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                                      /                                                                                         /              /    /  53   2*f\    /  2   f\    /  2   f\ /92   f \                 /              /    /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |     ||                                                                                                                                                                                                                                                                                                                                                                                                                                      /                                                                                         /              /    /  53   2*f\    /  2   f\    /  2   f\ /92   f \                 /              /    /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                                     /                                                                                         /              /     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                /              /     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                                                                                                                                                                                                                                                                                                                                                                                                              2    |     ||                                                                                                                                                                                                                                                                                                                                                                                                                                     /                                                                                         /              /     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                /              /     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                                                                                                                                                                                                                                                                                                                                                                                                              2    |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                                    /                                                                                         /     4        /      \  27    9 /    \  3   3/    \  3   3/ \27   27/    2*f        /     4        /      \  27    9 /    \  3   3/    \  3   3/ \27   27/    2*f                                                                                                                                                                                                                                                                                                                                                                                                                                              /  2   f\     |     ||                                                                                                                                                                                                                                                                                                                                                                                                                                    /                                                                                         /     4        /      \  27    9 /    \  3   3/    \  3   3/ \27   27/    2*f        /     4        /      \  27    9 /    \  3   3/    \  3   3/ \27   27/    2*f                                                                                                                                                                                                                                                                                                                                                                                                                                              /  2   f\     |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                                   /                                                                                         /      - - 2*3 /     - ------------- - ---------- + -------------------  + ---       /      - - 2*3 /     - ------------- - ---------- + -------------------  + ---                                                                                                                                                                                                                                                                                                                                                                                                                                              |- - - -|     |     ||                                                                                                                                                                                                                                                                                                                                                                                                                                   /                                                                                         /      - - 2*3 /     - ------------- - ---------- + -------------------  + ---       /      - - 2*3 /     - ------------- - ---------- + -------------------  + ---                                                                                                                                                                                                                                                                                                                                                                                                                                              |- - - -|     |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                             1   \/                                                                                        \/       9     \/              8            108                3              9      \/       9     \/              8            108                3              9                                                                                                                                                                                                                                                                                                                                                                                                                                     92   f    \  3   3/     |     ||                                                                                                                                                                                                                                                                                                                                                                                                                             1   \/                                                                                        \/       9     \/              8            108                3              9      \/       9     \/              8            108                3              9                                                                                                                                                                                                                                                                                                                                                                                                                                     92   f    \  3   3/     |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                             - + ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------- - ---------------------------------------------------------------------------------                                                                                                                                                                                                                                                                                                                                                                                                                               for -- - -- + ---------- = 0|     ||                                                                                                                                                                                                                                                                                                                                                                                                                             - + ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------- - ---------------------------------------------------------------------------------                                                                                                                                                                                                                                                                                                                                                                                                                               for -- - -- + ---------- = 0|
         ||                                                                                                                                                                                                                                                                                                                                                                                                                             3                                                                                        2                                                                                                                                 2                                                                                                                                                                                                                                                                                                                                                                                                                                                                           27   27       12        |     ||                                                                                                                                                                                                                                                                                                                                                                                                                             3                                                                                        2                                                                                                                                 2                                                                                                                                                                                                                                                                                                                                                                                                                                                                           27   27       12        |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |     ||                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
         ||                                     ___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________                                                                                                                                                                                                                                                                                                                                                                                                    |     ||                                     ___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________                                                                                                                                                                                                                                                                                                                                                                                                    |
         ||                                    /                  __________________________________________________________________________________________________________________________________________________                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |     ||                                    /                  __________________________________________________________________________________________________________________________________________________                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
         ||                                   /                  /           ___________________________________________________________________________________                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |     ||                                   /                  /           ___________________________________________________________________________________                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
         ||                                  /                  /           /                                                     2                           3                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |     ||                                  /                  /           /                                                     2                           3                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
         ||                                 /                  /           /  /              2            3                      \    /                2     \                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          /                2     \                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |     ||                                 /                  /           /  /              2            3                      \    /                2     \                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          /                2     \                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
         ||                                /                  /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |       /  2   f\      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |     ||                                /                  /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |       /  2   f\      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
         ||                               /                  /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |       |- - - -|      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |     ||                               /                  /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |       |- - - -|      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
         ||                              /                  /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                                                                                                                                        106   4*f                                                                                                                                                                                                                                                    |  92   \  3   3/    f |                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |     ||                              /                  /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                                                                                                                                        106   4*f                                                                                                                                                                                                                                                    |  92   \  3   3/    f |                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
x2 = I*im|<                             /                  /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                                                                                                                                      - --- - ---                                                                                                                                                                                                                                                  2*|- -- - ---------- + --|                                                                                                                                                                                                                                                                                                                                                                                                                                                                       | + re|<                             /                  /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                                                                                                                                      - --- - ---                                                                                                                                                                                                                                                  2*|- -- - ---------- + --|                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
         ||                            /         8        /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/    4*f                                                                                                                                                                                  27    9                                                                                                                                                                                                                                                     \  27       12       27/                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |     ||                            /         8        /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/    4*f                                                                                                                                                                                  27    9                                                                                                                                                                                                                                                     \  27       12       27/                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
         ||                           /          - - 2*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------  + --- + ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- + ---------------------------------------------------------------------------------------------------------------------------------------------------------------                                                                                                                                                                                                                                                                                                                                                                                                     |     ||                           /          - - 2*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------  + --- + ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- + ---------------------------------------------------------------------------------------------------------------------------------------------------------------                                                                                                                                                                                                                                                                                                                                                                                                     |
         ||                          /           9     \/          \/                                   4                                         27                     16           216                6              9                          _____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________                __________________________________________________________________________________________________________________________________________________                          _____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________                              |     ||                          /           9     \/          \/                                   4                                         27                     16           216                6              9                          _____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________                __________________________________________________________________________________________________________________________________________________                          _____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________                              |
         ||                         /                                                                                                                                                                                                             /                  __________________________________________________________________________________________________________________________________________________                                                                                                                                                                                        /           ___________________________________________________________________________________                                                                             /                  __________________________________________________________________________________________________________________________________________________                                                                                                                                                                                                       |     ||                         /                                                                                                                                                                                                             /                  __________________________________________________________________________________________________________________________________________________                                                                                                                                                                                        /           ___________________________________________________________________________________                                                                             /                  __________________________________________________________________________________________________________________________________________________                                                                                                                                                                                                       |
         ||                        /                                                                                                                                                                                                             /                  /           ___________________________________________________________________________________                                                                                                                                                                                                                                           /           /                                                     2                           3                                                                             /                  /           ___________________________________________________________________________________                                                                                                                                                                                                                                                           |     ||                        /                                                                                                                                                                                                             /                  /           ___________________________________________________________________________________                                                                                                                                                                                                                                           /           /                                                     2                           3                                                                             /                  /           ___________________________________________________________________________________                                                                                                                                                                                                                                                           |
         ||                       /                                                                                                                                                                                                             /                  /           /                                                     2                           3                                                                                                                                                                                                                                           /           /  /              2            3                      \    /                2     \                                                                             /                  /           /                                                     2                           3                                                                                                                                                                                                                                                            |     ||                       /                                                                                                                                                                                                             /                  /           /                                                     2                           3                                                                                                                                                                                                                                           /           /  /              2            3                      \    /                2     \                                                                             /                  /           /                                                     2                           3                                                                                                                                                                                                                                                            |
         ||                      /                                                                                                                                                                                                             /                  /           /  /              2            3                      \    /                2     \                                                                                                                                    /                2     \                                                                               /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                            /                  /           /  /              2            3                      \    /                2     \                                                                                                                                    /                2     \                                                                                                 |     ||                      /                                                                                                                                                                                                             /                  /           /  /              2            3                      \    /                2     \                                                                                                                                    /                2     \                                                                               /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                            /                  /           /  /              2            3                      \    /                2     \                                                                                                                                    /                2     \                                                                                                 |
         ||                     /                                                                                                                                                                                                             /                  /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                                                                    |       /  2   f\      |                                                                              /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                            /                  /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                                                                    |       /  2   f\      |                                                                                                 |     ||                     /                                                                                                                                                                                                             /                  /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                                                                    |       /  2   f\      |                                                                              /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                            /                  /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                                                                    |       /  2   f\      |                                                                                                 |
         ||                    /                                                                                                                                                                                                             /                  /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                                                                     |       |- - - -|      |                                                                             /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                     /                  /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                                                                     |       |- - - -|      |                                                                                                 |     ||                    /                                                                                                                                                                                                             /                  /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                                                                     |       |- - - -|      |                                                                             /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                     /                  /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                                                                     |       |- - - -|      |                                                                                                 |
         ||                   /                                                                                                                                                                                                             /                  /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                               |  92   \  3   3/    f |                                                                            /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                    /                  /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                               |  92   \  3   3/    f |                                                                                                 |     ||                   /                                                                                                                                                                                                             /                  /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                               |  92   \  3   3/    f |                                                                            /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                    /                  /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                               |  92   \  3   3/    f |                                                                                                 |
         ||                  /                                                                                                                                                                                                             /                  /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                             2*|- -- - ---------- + --|                                                                           /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/                   /                  /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                             2*|- -- - ---------- + --|                                                                                                 |     ||                  /                                                                                                                                                                                                             /                  /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                             2*|- -- - ---------- + --|                                                                           /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/                   /                  /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                             2*|- -- - ---------- + --|                                                                                                 |
         ||                 /                                                                                                                                                                                                             /         4        /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/    2*f                                                                        \  27       12       27/                                                                      3*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------                  /         4        /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/    2*f                                                                        \  27       12       27/                                                                                                 |     ||                 /                                                                                                                                                                                                             /         4        /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/    2*f                                                                        \  27       12       27/                                                                      3*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------                  /         4        /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/    2*f                                                                        \  27       12       27/                                                                                                 |
         ||                /                                                                                                                                                                                                             /          - + 2*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------  + --- - ---------------------------------------------------------------------------------------------------------------------------------------------------------------      \/          \/                                   4                                         27                     16           216                6                          /          - + 2*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------  + --- - ---------------------------------------------------------------------------------------------------------------------------------------------------------------                               |     ||                /                                                                                                                                                                                                             /          - + 2*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------  + --- - ---------------------------------------------------------------------------------------------------------------------------------------------------------------      \/          \/                                   4                                         27                     16           216                6                          /          - + 2*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------  + --- - ---------------------------------------------------------------------------------------------------------------------------------------------------------------                               |
         ||               /                                                                                                                                                                                                             /           9     \/          \/                                   4                                         27                     16           216                6              9                 __________________________________________________________________________________________________________________________________________________                                                                                                                                                                                  /           9     \/          \/                                   4                                         27                     16           216                6              9                 __________________________________________________________________________________________________________________________________________________                               |     ||               /                                                                                                                                                                                                             /           9     \/          \/                                   4                                         27                     16           216                6              9                 __________________________________________________________________________________________________________________________________________________                                                                                                                                                                                  /           9     \/          \/                                   4                                         27                     16           216                6              9                 __________________________________________________________________________________________________________________________________________________                               |
         ||              /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           ___________________________________________________________________________________                                                                                                                                                                                                                                     /                                                                                                                                                                                                    /           ___________________________________________________________________________________                                                                                   |     ||              /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           ___________________________________________________________________________________                                                                                                                                                                                                                                     /                                                                                                                                                                                                    /           ___________________________________________________________________________________                                                                                   |
         ||             /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /                                                     2                           3                                                                                                                                                                                                                                     /                                                                                                                                                                                                    /           /                                                     2                           3                                                                                    |     ||             /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /                                                     2                           3                                                                                                                                                                                                                                     /                                                                                                                                                                                                    /           /                                                     2                           3                                                                                    |
         ||            /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /  /              2            3                      \    /                2     \                                                                                                                                                                                                                                     /                                                                                                                                                                                                    /           /  /              2            3                      \    /                2     \                                                                                     |     ||            /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /  /              2            3                      \    /                2     \                                                                                                                                                                                                                                     /                                                                                                                                                                                                    /           /  /              2            3                      \    /                2     \                                                                                     |
         ||           /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                                                                                                                                                                    /                                                                                                                                                                                                    /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                     |     ||           /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                                                                                                                                                                    /                                                                                                                                                                                                    /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                     |
         ||          /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                                                                                                                                                                    /                                                                                                                                                                                                    /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                      |     ||          /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                                                                                                                                                                    /                                                                                                                                                                                                    /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                      |
         ||         /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                                                                                                                             /                                                                                                                                                                                                    /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                |     ||         /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                                                                                                                             /                                                                                                                                                                                                    /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                |
         ||        /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                                                                                                                            /                                                                                                                                                                                                    /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                |     ||        /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                                                                                                                            /                                                                                                                                                                                                    /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                |
         ||       /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/                                                                                                                                                                           /                                                                                                                                                                                                    /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/                                |     ||       /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/                                                                                                                                                                           /                                                                                                                                                                                                    /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/                                |
         ||      /                                                                                                                                                                                                             /                                                                                                                                                                                                3*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------                                                                                                                                                                          /                                                                                                                                                                                                3*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------                                |     ||      /                                                                                                                                                                                                             /                                                                                                                                                                                                3*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------                                                                                                                                                                          /                                                                                                                                                                                                3*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------                                |
         ||1   \/                                                                                                                                                                                                            \/                                                                                                                                                                                                   \/          \/                                   4                                         27                     16           216                6                                                                                                                                                                                 \/                                                                                                                                                                                                   \/          \/                                   4                                         27                     16           216                6                                         |     ||1   \/                                                                                                                                                                                                            \/                                                                                                                                                                                                   \/          \/                                   4                                         27                     16           216                6                                                                                                                                                                                 \/                                                                                                                                                                                                   \/          \/                                   4                                         27                     16           216                6                                         |
         ||- + ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- - -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------           otherwise          |     ||- + ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- - -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------           otherwise          |
         \\3                                                                                                                                                                                                                                                                                                                                                                            2                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              2                                                                                                                                                                                                               /     \\3                                                                                                                                                                                                                                                                                                                                                                            2                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              2                                                                                                                                                                                                               /
$$x_{2} = \operatorname{re}{\left(\begin{cases} - \frac{\sqrt{\frac{2 f}{9} - 2 \sqrt[3]{\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}} + \frac{4}{9}}}{2} + \frac{\sqrt{\frac{4 f}{9} + \frac{- \frac{4 f}{9} - \frac{106}{27}}{\sqrt{\frac{2 f}{9} - 2 \sqrt[3]{\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}} + \frac{4}{9}}} + 2 \sqrt[3]{\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}} + \frac{8}{9}}}{2} + \frac{1}{3} & \text{for}\: - \frac{f}{27} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} + \frac{92}{27} = 0 \\- \frac{\sqrt{\frac{2 f}{9} - \frac{2 \left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)}{3 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}}} + 2 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}} + \frac{4}{9}}}{2} + \frac{\sqrt{\frac{4 f}{9} + \frac{- \frac{4 f}{9} - \frac{106}{27}}{\sqrt{\frac{2 f}{9} - \frac{2 \left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)}{3 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}}} + 2 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}} + \frac{4}{9}}} + \frac{2 \left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)}{3 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}}} - 2 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}} + \frac{8}{9}}}{2} + \frac{1}{3} & \text{otherwise} \end{cases}\right)} + i \operatorname{im}{\left(\begin{cases} - \frac{\sqrt{\frac{2 f}{9} - 2 \sqrt[3]{\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}} + \frac{4}{9}}}{2} + \frac{\sqrt{\frac{4 f}{9} + \frac{- \frac{4 f}{9} - \frac{106}{27}}{\sqrt{\frac{2 f}{9} - 2 \sqrt[3]{\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}} + \frac{4}{9}}} + 2 \sqrt[3]{\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}} + \frac{8}{9}}}{2} + \frac{1}{3} & \text{for}\: - \frac{f}{27} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} + \frac{92}{27} = 0 \\- \frac{\sqrt{\frac{2 f}{9} - \frac{2 \left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)}{3 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}}} + 2 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}} + \frac{4}{9}}}{2} + \frac{\sqrt{\frac{4 f}{9} + \frac{- \frac{4 f}{9} - \frac{106}{27}}{\sqrt{\frac{2 f}{9} - \frac{2 \left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)}{3 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}}} + 2 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}} + \frac{4}{9}}} + \frac{2 \left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)}{3 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}}} - 2 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}} + \frac{8}{9}}}{2} + \frac{1}{3} & \text{otherwise} \end{cases}\right)}$$
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         ||                                                                                                                                                                                                                                                                                                                                                                                                                                      /              /    /  53   2*f\    /  2   f\    /  2   f\ /92   f \                /                                                                                         /              /    /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |     ||                                                                                                                                                                                                                                                                                                                                                                                                                                      /              /    /  53   2*f\    /  2   f\    /  2   f\ /92   f \                /                                                                                         /              /    /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                                     /              /     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|               /                                                                                         /              /     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                                                                                                                                                                                                                                                                                                                                                                                                               2    |     ||                                                                                                                                                                                                                                                                                                                                                                                                                                     /              /     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|               /                                                                                         /              /     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                                                                                                                                                                                                                                                                                                                                                                                                               2    |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                                    /     4        /      \  27    9 /    \  3   3/    \  3   3/ \27   27/    2*f       /                                                                                         /     4        /      \  27    9 /    \  3   3/    \  3   3/ \27   27/    2*f                                                                                                                                                                                                                                                                                                                                                                                                                                               /  2   f\     |     ||                                                                                                                                                                                                                                                                                                                                                                                                                                    /     4        /      \  27    9 /    \  3   3/    \  3   3/ \27   27/    2*f       /                                                                                         /     4        /      \  27    9 /    \  3   3/    \  3   3/ \27   27/    2*f                                                                                                                                                                                                                                                                                                                                                                                                                                               /  2   f\     |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                                   /      - - 2*3 /     - ------------- - ---------- + -------------------  + ---      /                                                                                         /      - - 2*3 /     - ------------- - ---------- + -------------------  + ---                                                                                                                                                                                                                                                                                                                                                                                                                                               |- - - -|     |     ||                                                                                                                                                                                                                                                                                                                                                                                                                                   /      - - 2*3 /     - ------------- - ---------- + -------------------  + ---      /                                                                                         /      - - 2*3 /     - ------------- - ---------- + -------------------  + ---                                                                                                                                                                                                                                                                                                                                                                                                                                               |- - - -|     |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                             1   \/       9     \/              8            108                3              9     \/                                                                                        \/       9     \/              8            108                3              9                                                                                                                                                                                                                                                                                                                                                                                                                                      92   f    \  3   3/     |     ||                                                                                                                                                                                                                                                                                                                                                                                                                             1   \/       9     \/              8            108                3              9     \/                                                                                        \/       9     \/              8            108                3              9                                                                                                                                                                                                                                                                                                                                                                                                                                      92   f    \  3   3/     |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                             - + --------------------------------------------------------------------------------- - ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------                                                                                                                                                                                                                                                                                                                                                                                                                               for -- - -- + ---------- = 0|     ||                                                                                                                                                                                                                                                                                                                                                                                                                             - + --------------------------------------------------------------------------------- - ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------                                                                                                                                                                                                                                                                                                                                                                                                                               for -- - -- + ---------- = 0|
         ||                                                                                                                                                                                                                                                                                                                                                                                                                             3                                           2                                                                                                                                2                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         27   27       12        |     ||                                                                                                                                                                                                                                                                                                                                                                                                                             3                                           2                                                                                                                                2                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         27   27       12        |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |     ||                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
         ||                                                                                                                                                                                                                                                                                                                                                                                                           ___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________                              |     ||                                                                                                                                                                                                                                                                                                                                                                                                           ___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________                              |
         ||                                                                                                                                                                                                                                                                                                                                                                                                          /                  __________________________________________________________________________________________________________________________________________________                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |     ||                                                                                                                                                                                                                                                                                                                                                                                                          /                  __________________________________________________________________________________________________________________________________________________                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
         ||                                                                                                                                                                                                                                                                                                                                                                                                         /                  /           ___________________________________________________________________________________                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |     ||                                                                                                                                                                                                                                                                                                                                                                                                         /                  /           ___________________________________________________________________________________                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
         ||                                                                                                                                                                                                                                                                                                                                                                                                        /                  /           /                                                     2                           3                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |     ||                                                                                                                                                                                                                                                                                                                                                                                                        /                  /           /                                                     2                           3                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
         ||                                                                                                                                                                                                                                                                                                                                                                                                       /                  /           /  /              2            3                      \    /                2     \                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          /                2     \                                                                                                 |     ||                                                                                                                                                                                                                                                                                                                                                                                                       /                  /           /  /              2            3                      \    /                2     \                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          /                2     \                                                                                                 |
         ||                                                                                                                                                                                                                                                                                                                                                                                                      /                  /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |       /  2   f\      |                                                                                                 |     ||                                                                                                                                                                                                                                                                                                                                                                                                      /                  /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |       /  2   f\      |                                                                                                 |
         ||                                                                                                                                                                                                                                                                                                                                                                                                     /                  /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |       |- - - -|      |                                                                                                 |     ||                                                                                                                                                                                                                                                                                                                                                                                                     /                  /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |       |- - - -|      |                                                                                                 |
         ||                                                                                                                                                                                                                                                                                                                                                                                                    /                  /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                                                                                                                                        106   4*f                                                                                                                                                                                                                                                    |  92   \  3   3/    f |                                                                                                 |     ||                                                                                                                                                                                                                                                                                                                                                                                                    /                  /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                                                                                                                                        106   4*f                                                                                                                                                                                                                                                    |  92   \  3   3/    f |                                                                                                 |
x3 = I*im|<                                                                                                                                                                                                                                                                                                                                                                                                   /                  /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                                                                                                                                      - --- - ---                                                                                                                                                                                                                                                  2*|- -- - ---------- + --|                                                                                                 | + re|<                                                                                                                                                                                                                                                                                                                                                                                                   /                  /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                                                                                                                                      - --- - ---                                                                                                                                                                                                                                                  2*|- -- - ---------- + --|                                                                                                 |
         ||                                                                                                                                                                                                                                                                                                                                                                                                  /         8        /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/    4*f                                                                                                                                                                                  27    9                                                                                                                                                                                                                                                     \  27       12       27/                                                                                                 |     ||                                                                                                                                                                                                                                                                                                                                                                                                  /         8        /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/    4*f                                                                                                                                                                                  27    9                                                                                                                                                                                                                                                     \  27       12       27/                                                                                                 |
         ||                                                                                                                                                                                                                                                                                                                                                                                                 /          - - 2*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------  + --- - ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- + ---------------------------------------------------------------------------------------------------------------------------------------------------------------                               |     ||                                                                                                                                                                                                                                                                                                                                                                                                 /          - - 2*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------  + --- - ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- + ---------------------------------------------------------------------------------------------------------------------------------------------------------------                               |
         ||                          _____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________                         /           9     \/          \/                                   4                                         27                     16           216                6              9                          _____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________                __________________________________________________________________________________________________________________________________________________                               |     ||                          _____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________                         /           9     \/          \/                                   4                                         27                     16           216                6              9                          _____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________                __________________________________________________________________________________________________________________________________________________                               |
         ||                         /                  __________________________________________________________________________________________________________________________________________________                                                                                                                                                                                                 /                                                                                                                                                                                                             /                  __________________________________________________________________________________________________________________________________________________                                                                                                                                                                                        /           ___________________________________________________________________________________                                                                                   |     ||                         /                  __________________________________________________________________________________________________________________________________________________                                                                                                                                                                                                 /                                                                                                                                                                                                             /                  __________________________________________________________________________________________________________________________________________________                                                                                                                                                                                        /           ___________________________________________________________________________________                                                                                   |
         ||                        /                  /           ___________________________________________________________________________________                                                                                                                                                                                                                                                    /                                                                                                                                                                                                             /                  /           ___________________________________________________________________________________                                                                                                                                                                                                                                           /           /                                                     2                           3                                                                                    |     ||                        /                  /           ___________________________________________________________________________________                                                                                                                                                                                                                                                    /                                                                                                                                                                                                             /                  /           ___________________________________________________________________________________                                                                                                                                                                                                                                           /           /                                                     2                           3                                                                                    |
         ||                       /                  /           /                                                     2                           3                                                                                                                                                                                                                                                    /                                                                                                                                                                                                             /                  /           /                                                     2                           3                                                                                                                                                                                                                                           /           /  /              2            3                      \    /                2     \                                                                                     |     ||                       /                  /           /                                                     2                           3                                                                                                                                                                                                                                                    /                                                                                                                                                                                                             /                  /           /                                                     2                           3                                                                                                                                                                                                                                           /           /  /              2            3                      \    /                2     \                                                                                     |
         ||                      /                  /           /  /              2            3                      \    /                2     \                                                                                                                                    /                2     \                                                                                        /                                                                                                                                                                                                             /                  /           /  /              2            3                      \    /                2     \                                                                                                                                    /                2     \                                                                               /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                     |     ||                      /                  /           /  /              2            3                      \    /                2     \                                                                                                                                    /                2     \                                                                                        /                                                                                                                                                                                                             /                  /           /  /              2            3                      \    /                2     \                                                                                                                                    /                2     \                                                                               /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                     |
         ||                     /                  /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                                                                    |       /  2   f\      |                                                                                       /                                                                                                                                                                                                             /                  /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                                                                    |       /  2   f\      |                                                                              /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                      |     ||                     /                  /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                                                                    |       /  2   f\      |                                                                                       /                                                                                                                                                                                                             /                  /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                                                                    |       /  2   f\      |                                                                              /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                      |
         ||                    /                  /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                                                                     |       |- - - -|      |                                                                                      /                                                                                                                                                                                                             /                  /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                                                                     |       |- - - -|      |                                                                             /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                |     ||                    /                  /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                                                                     |       |- - - -|      |                                                                                      /                                                                                                                                                                                                             /                  /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                                                                     |       |- - - -|      |                                                                             /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                |
         ||                   /                  /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                               |  92   \  3   3/    f |                                                                                     /                                                                                                                                                                                                             /                  /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                               |  92   \  3   3/    f |                                                                            /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                |     ||                   /                  /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                               |  92   \  3   3/    f |                                                                                     /                                                                                                                                                                                                             /                  /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                               |  92   \  3   3/    f |                                                                            /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                |
         ||                  /                  /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                             2*|- -- - ---------- + --|                                                                                    /                                                                                                                                                                                                             /                  /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                             2*|- -- - ---------- + --|                                                                           /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/                                |     ||                  /                  /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                             2*|- -- - ---------- + --|                                                                                    /                                                                                                                                                                                                             /                  /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                             2*|- -- - ---------- + --|                                                                           /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/                                |
         ||                 /         4        /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/    2*f                                                                        \  27       12       27/                                                                                   /                                                                                                                                                                                                             /         4        /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/    2*f                                                                        \  27       12       27/                                                                      3*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------                                |     ||                 /         4        /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/    2*f                                                                        \  27       12       27/                                                                                   /                                                                                                                                                                                                             /         4        /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/    2*f                                                                        \  27       12       27/                                                                      3*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------                                |
         ||                /          - + 2*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------  + --- - ---------------------------------------------------------------------------------------------------------------------------------------------------------------                /                                                                                                                                                                                                             /          - + 2*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------  + --- - ---------------------------------------------------------------------------------------------------------------------------------------------------------------      \/          \/                                   4                                         27                     16           216                6                                         |     ||                /          - + 2*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------  + --- - ---------------------------------------------------------------------------------------------------------------------------------------------------------------                /                                                                                                                                                                                                             /          - + 2*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------  + --- - ---------------------------------------------------------------------------------------------------------------------------------------------------------------      \/          \/                                   4                                         27                     16           216                6                                         |
         ||               /           9     \/          \/                                   4                                         27                     16           216                6              9                 __________________________________________________________________________________________________________________________________________________               /                                                                                                                                                                                                             /           9     \/          \/                                   4                                         27                     16           216                6              9                 __________________________________________________________________________________________________________________________________________________                                                                                                                                                                                                  |     ||               /           9     \/          \/                                   4                                         27                     16           216                6              9                 __________________________________________________________________________________________________________________________________________________               /                                                                                                                                                                                                             /           9     \/          \/                                   4                                         27                     16           216                6              9                 __________________________________________________________________________________________________________________________________________________                                                                                                                                                                                                  |
         ||              /                                                                                                                                                                                                    /           ___________________________________________________________________________________                                                                  /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           ___________________________________________________________________________________                                                                                                                                                                                                                                                      |     ||              /                                                                                                                                                                                                    /           ___________________________________________________________________________________                                                                  /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           ___________________________________________________________________________________                                                                                                                                                                                                                                                      |
         ||             /                                                                                                                                                                                                    /           /                                                     2                           3                                                                  /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /                                                     2                           3                                                                                                                                                                                                                                                       |     ||             /                                                                                                                                                                                                    /           /                                                     2                           3                                                                  /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /                                                     2                           3                                                                                                                                                                                                                                                       |
         ||            /                                                                                                                                                                                                    /           /  /              2            3                      \    /                2     \                                                                  /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /  /              2            3                      \    /                2     \                                                                                                                                                                                                                                                        |     ||            /                                                                                                                                                                                                    /           /  /              2            3                      \    /                2     \                                                                  /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /  /              2            3                      \    /                2     \                                                                                                                                                                                                                                                        |
         ||           /                                                                                                                                                                                                    /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                 /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                                                                                                                                                                                        |     ||           /                                                                                                                                                                                                    /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                 /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                                                                                                                                                                                        |
         ||          /                                                                                                                                                                                                    /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                 /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                                                                                                                                                                                         |     ||          /                                                                                                                                                                                                    /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                 /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                                                                                                                                                                                         |
         ||         /                                                                                                                                                                                                    /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \          /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                                                                                                                                                   |     ||         /                                                                                                                                                                                                    /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \          /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                                                                                                                                                   |
         ||        /                                                                                                                                                                                                    /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|         /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                                                                                                                                                   |     ||        /                                                                                                                                                                                                    /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|         /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                                                                                                                                                   |
         ||       /                                                                                                                                                                                                    /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/        /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/                                                                                                                                                                                                   |     ||       /                                                                                                                                                                                                    /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/        /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/                                                                                                                                                                                                   |
         ||      /                                                                                                                                                                                                3*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------       /                                                                                                                                                                                                             /                                                                                                                                                                                                3*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------                                                                                                                                                                                                   |     ||      /                                                                                                                                                                                                3*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------       /                                                                                                                                                                                                             /                                                                                                                                                                                                3*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------                                                                                                                                                                                                   |
         ||1   \/                                                                                                                                                                                                   \/          \/                                   4                                         27                     16           216                6              \/                                                                                                                                                                                                            \/                                                                                                                                                                                                   \/          \/                                   4                                         27                     16           216                6                                                                                                                                                                                                            |     ||1   \/                                                                                                                                                                                                   \/          \/                                   4                                         27                     16           216                6              \/                                                                                                                                                                                                            \/                                                                                                                                                                                                   \/          \/                                   4                                         27                     16           216                6                                                                                                                                                                                                            |
         ||- + ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- - ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------           otherwise          |     ||- + ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- - ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------           otherwise          |
         \\3                                                                                                                                                                                    2                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             2                                                                                                                                                                                                                                                                                                                                                                                                        /     \\3                                                                                                                                                                                    2                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             2                                                                                                                                                                                                                                                                                                                                                                                                        /
$$x_{3} = \operatorname{re}{\left(\begin{cases} \frac{\sqrt{\frac{2 f}{9} - 2 \sqrt[3]{\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}} + \frac{4}{9}}}{2} - \frac{\sqrt{\frac{4 f}{9} - \frac{- \frac{4 f}{9} - \frac{106}{27}}{\sqrt{\frac{2 f}{9} - 2 \sqrt[3]{\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}} + \frac{4}{9}}} + 2 \sqrt[3]{\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}} + \frac{8}{9}}}{2} + \frac{1}{3} & \text{for}\: - \frac{f}{27} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} + \frac{92}{27} = 0 \\\frac{\sqrt{\frac{2 f}{9} - \frac{2 \left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)}{3 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}}} + 2 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}} + \frac{4}{9}}}{2} - \frac{\sqrt{\frac{4 f}{9} - \frac{- \frac{4 f}{9} - \frac{106}{27}}{\sqrt{\frac{2 f}{9} - \frac{2 \left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)}{3 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}}} + 2 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}} + \frac{4}{9}}} + \frac{2 \left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)}{3 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}}} - 2 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}} + \frac{8}{9}}}{2} + \frac{1}{3} & \text{otherwise} \end{cases}\right)} + i \operatorname{im}{\left(\begin{cases} \frac{\sqrt{\frac{2 f}{9} - 2 \sqrt[3]{\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}} + \frac{4}{9}}}{2} - \frac{\sqrt{\frac{4 f}{9} - \frac{- \frac{4 f}{9} - \frac{106}{27}}{\sqrt{\frac{2 f}{9} - 2 \sqrt[3]{\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}} + \frac{4}{9}}} + 2 \sqrt[3]{\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}} + \frac{8}{9}}}{2} + \frac{1}{3} & \text{for}\: - \frac{f}{27} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} + \frac{92}{27} = 0 \\\frac{\sqrt{\frac{2 f}{9} - \frac{2 \left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)}{3 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}}} + 2 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}} + \frac{4}{9}}}{2} - \frac{\sqrt{\frac{4 f}{9} - \frac{- \frac{4 f}{9} - \frac{106}{27}}{\sqrt{\frac{2 f}{9} - \frac{2 \left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)}{3 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}}} + 2 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}} + \frac{4}{9}}} + \frac{2 \left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)}{3 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}}} - 2 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}} + \frac{8}{9}}}{2} + \frac{1}{3} & \text{otherwise} \end{cases}\right)}$$
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         ||                                                                                                                                                                                                                                                                                                                                                                                                                                     /              /     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|               /                                                                                         /              /     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                                                                                                                                                                                                                                                                                                                                                                                                               2    |     ||                                                                                                                                                                                                                                                                                                                                                                                                                                     /              /     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|               /                                                                                         /              /     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                                                                                                                                                                                                                                                                                                                                                                                                               2    |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                                    /     4        /      \  27    9 /    \  3   3/    \  3   3/ \27   27/    2*f       /                                                                                         /     4        /      \  27    9 /    \  3   3/    \  3   3/ \27   27/    2*f                                                                                                                                                                                                                                                                                                                                                                                                                                               /  2   f\     |     ||                                                                                                                                                                                                                                                                                                                                                                                                                                    /     4        /      \  27    9 /    \  3   3/    \  3   3/ \27   27/    2*f       /                                                                                         /     4        /      \  27    9 /    \  3   3/    \  3   3/ \27   27/    2*f                                                                                                                                                                                                                                                                                                                                                                                                                                               /  2   f\     |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                                   /      - - 2*3 /     - ------------- - ---------- + -------------------  + ---      /                                                                                         /      - - 2*3 /     - ------------- - ---------- + -------------------  + ---                                                                                                                                                                                                                                                                                                                                                                                                                                               |- - - -|     |     ||                                                                                                                                                                                                                                                                                                                                                                                                                                   /      - - 2*3 /     - ------------- - ---------- + -------------------  + ---      /                                                                                         /      - - 2*3 /     - ------------- - ---------- + -------------------  + ---                                                                                                                                                                                                                                                                                                                                                                                                                                               |- - - -|     |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                             1   \/       9     \/              8            108                3              9     \/                                                                                        \/       9     \/              8            108                3              9                                                                                                                                                                                                                                                                                                                                                                                                                                      92   f    \  3   3/     |     ||                                                                                                                                                                                                                                                                                                                                                                                                                             1   \/       9     \/              8            108                3              9     \/                                                                                        \/       9     \/              8            108                3              9                                                                                                                                                                                                                                                                                                                                                                                                                                      92   f    \  3   3/     |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                             - + --------------------------------------------------------------------------------- + ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------                                                                                                                                                                                                                                                                                                                                                                                                                               for -- - -- + ---------- = 0|     ||                                                                                                                                                                                                                                                                                                                                                                                                                             - + --------------------------------------------------------------------------------- + ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------                                                                                                                                                                                                                                                                                                                                                                                                                               for -- - -- + ---------- = 0|
         ||                                                                                                                                                                                                                                                                                                                                                                                                                             3                                           2                                                                                                                                2                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         27   27       12        |     ||                                                                                                                                                                                                                                                                                                                                                                                                                             3                                           2                                                                                                                                2                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         27   27       12        |
         ||                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |     ||                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
         ||                                                                                                                                                                                                                                                                                                                                                                                                           ___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________                              |     ||                                                                                                                                                                                                                                                                                                                                                                                                           ___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________                              |
         ||                                                                                                                                                                                                                                                                                                                                                                                                          /                  __________________________________________________________________________________________________________________________________________________                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |     ||                                                                                                                                                                                                                                                                                                                                                                                                          /                  __________________________________________________________________________________________________________________________________________________                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
         ||                                                                                                                                                                                                                                                                                                                                                                                                         /                  /           ___________________________________________________________________________________                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |     ||                                                                                                                                                                                                                                                                                                                                                                                                         /                  /           ___________________________________________________________________________________                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
         ||                                                                                                                                                                                                                                                                                                                                                                                                        /                  /           /                                                     2                           3                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |     ||                                                                                                                                                                                                                                                                                                                                                                                                        /                  /           /                                                     2                           3                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
         ||                                                                                                                                                                                                                                                                                                                                                                                                       /                  /           /  /              2            3                      \    /                2     \                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          /                2     \                                                                                                 |     ||                                                                                                                                                                                                                                                                                                                                                                                                       /                  /           /  /              2            3                      \    /                2     \                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          /                2     \                                                                                                 |
         ||                                                                                                                                                                                                                                                                                                                                                                                                      /                  /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |       /  2   f\      |                                                                                                 |     ||                                                                                                                                                                                                                                                                                                                                                                                                      /                  /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |       /  2   f\      |                                                                                                 |
         ||                                                                                                                                                                                                                                                                                                                                                                                                     /                  /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |       |- - - -|      |                                                                                                 |     ||                                                                                                                                                                                                                                                                                                                                                                                                     /                  /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |       |- - - -|      |                                                                                                 |
         ||                                                                                                                                                                                                                                                                                                                                                                                                    /                  /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                                                                                                                                        106   4*f                                                                                                                                                                                                                                                    |  92   \  3   3/    f |                                                                                                 |     ||                                                                                                                                                                                                                                                                                                                                                                                                    /                  /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                                                                                                                                        106   4*f                                                                                                                                                                                                                                                    |  92   \  3   3/    f |                                                                                                 |
x4 = I*im|<                                                                                                                                                                                                                                                                                                                                                                                                   /                  /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                                                                                                                                      - --- - ---                                                                                                                                                                                                                                                  2*|- -- - ---------- + --|                                                                                                 | + re|<                                                                                                                                                                                                                                                                                                                                                                                                   /                  /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                                                                                                                                      - --- - ---                                                                                                                                                                                                                                                  2*|- -- - ---------- + --|                                                                                                 |
         ||                                                                                                                                                                                                                                                                                                                                                                                                  /         8        /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/    4*f                                                                                                                                                                                  27    9                                                                                                                                                                                                                                                     \  27       12       27/                                                                                                 |     ||                                                                                                                                                                                                                                                                                                                                                                                                  /         8        /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/    4*f                                                                                                                                                                                  27    9                                                                                                                                                                                                                                                     \  27       12       27/                                                                                                 |
         ||                                                                                                                                                                                                                                                                                                                                                                                                 /          - - 2*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------  + --- - ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- + ---------------------------------------------------------------------------------------------------------------------------------------------------------------                               |     ||                                                                                                                                                                                                                                                                                                                                                                                                 /          - - 2*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------  + --- - ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- + ---------------------------------------------------------------------------------------------------------------------------------------------------------------                               |
         ||                          _____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________                         /           9     \/          \/                                   4                                         27                     16           216                6              9                          _____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________                __________________________________________________________________________________________________________________________________________________                               |     ||                          _____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________                         /           9     \/          \/                                   4                                         27                     16           216                6              9                          _____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________                __________________________________________________________________________________________________________________________________________________                               |
         ||                         /                  __________________________________________________________________________________________________________________________________________________                                                                                                                                                                                                 /                                                                                                                                                                                                             /                  __________________________________________________________________________________________________________________________________________________                                                                                                                                                                                        /           ___________________________________________________________________________________                                                                                   |     ||                         /                  __________________________________________________________________________________________________________________________________________________                                                                                                                                                                                                 /                                                                                                                                                                                                             /                  __________________________________________________________________________________________________________________________________________________                                                                                                                                                                                        /           ___________________________________________________________________________________                                                                                   |
         ||                        /                  /           ___________________________________________________________________________________                                                                                                                                                                                                                                                    /                                                                                                                                                                                                             /                  /           ___________________________________________________________________________________                                                                                                                                                                                                                                           /           /                                                     2                           3                                                                                    |     ||                        /                  /           ___________________________________________________________________________________                                                                                                                                                                                                                                                    /                                                                                                                                                                                                             /                  /           ___________________________________________________________________________________                                                                                                                                                                                                                                           /           /                                                     2                           3                                                                                    |
         ||                       /                  /           /                                                     2                           3                                                                                                                                                                                                                                                    /                                                                                                                                                                                                             /                  /           /                                                     2                           3                                                                                                                                                                                                                                           /           /  /              2            3                      \    /                2     \                                                                                     |     ||                       /                  /           /                                                     2                           3                                                                                                                                                                                                                                                    /                                                                                                                                                                                                             /                  /           /                                                     2                           3                                                                                                                                                                                                                                           /           /  /              2            3                      \    /                2     \                                                                                     |
         ||                      /                  /           /  /              2            3                      \    /                2     \                                                                                                                                    /                2     \                                                                                        /                                                                                                                                                                                                             /                  /           /  /              2            3                      \    /                2     \                                                                                                                                    /                2     \                                                                               /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                     |     ||                      /                  /           /  /              2            3                      \    /                2     \                                                                                                                                    /                2     \                                                                                        /                                                                                                                                                                                                             /                  /           /  /              2            3                      \    /                2     \                                                                                                                                    /                2     \                                                                               /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                     |
         ||                     /                  /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                                                                    |       /  2   f\      |                                                                                       /                                                                                                                                                                                                             /                  /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                                                                    |       /  2   f\      |                                                                              /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                      |     ||                     /                  /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                                                                    |       /  2   f\      |                                                                                       /                                                                                                                                                                                                             /                  /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                                                                    |       /  2   f\      |                                                                              /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                      |
         ||                    /                  /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                                                                     |       |- - - -|      |                                                                                      /                                                                                                                                                                                                             /                  /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                                                                     |       |- - - -|      |                                                                             /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                |     ||                    /                  /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                                                                     |       |- - - -|      |                                                                                      /                                                                                                                                                                                                             /                  /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                                                                     |       |- - - -|      |                                                                             /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                |
         ||                   /                  /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                               |  92   \  3   3/    f |                                                                                     /                                                                                                                                                                                                             /                  /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                               |  92   \  3   3/    f |                                                                            /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                |     ||                   /                  /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                               |  92   \  3   3/    f |                                                                                     /                                                                                                                                                                                                             /                  /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                               |  92   \  3   3/    f |                                                                            /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                |
         ||                  /                  /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                             2*|- -- - ---------- + --|                                                                                    /                                                                                                                                                                                                             /                  /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                             2*|- -- - ---------- + --|                                                                           /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/                                |     ||                  /                  /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                             2*|- -- - ---------- + --|                                                                                    /                                                                                                                                                                                                             /                  /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                             2*|- -- - ---------- + --|                                                                           /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/                                |
         ||                 /         4        /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/    2*f                                                                        \  27       12       27/                                                                                   /                                                                                                                                                                                                             /         4        /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/    2*f                                                                        \  27       12       27/                                                                      3*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------                                |     ||                 /         4        /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/    2*f                                                                        \  27       12       27/                                                                                   /                                                                                                                                                                                                             /         4        /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/    2*f                                                                        \  27       12       27/                                                                      3*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------                                |
         ||                /          - + 2*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------  + --- - ---------------------------------------------------------------------------------------------------------------------------------------------------------------                /                                                                                                                                                                                                             /          - + 2*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------  + --- - ---------------------------------------------------------------------------------------------------------------------------------------------------------------      \/          \/                                   4                                         27                     16           216                6                                         |     ||                /          - + 2*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------  + --- - ---------------------------------------------------------------------------------------------------------------------------------------------------------------                /                                                                                                                                                                                                             /          - + 2*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------  + --- - ---------------------------------------------------------------------------------------------------------------------------------------------------------------      \/          \/                                   4                                         27                     16           216                6                                         |
         ||               /           9     \/          \/                                   4                                         27                     16           216                6              9                 __________________________________________________________________________________________________________________________________________________               /                                                                                                                                                                                                             /           9     \/          \/                                   4                                         27                     16           216                6              9                 __________________________________________________________________________________________________________________________________________________                                                                                                                                                                                                  |     ||               /           9     \/          \/                                   4                                         27                     16           216                6              9                 __________________________________________________________________________________________________________________________________________________               /                                                                                                                                                                                                             /           9     \/          \/                                   4                                         27                     16           216                6              9                 __________________________________________________________________________________________________________________________________________________                                                                                                                                                                                                  |
         ||              /                                                                                                                                                                                                    /           ___________________________________________________________________________________                                                                  /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           ___________________________________________________________________________________                                                                                                                                                                                                                                                      |     ||              /                                                                                                                                                                                                    /           ___________________________________________________________________________________                                                                  /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           ___________________________________________________________________________________                                                                                                                                                                                                                                                      |
         ||             /                                                                                                                                                                                                    /           /                                                     2                           3                                                                  /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /                                                     2                           3                                                                                                                                                                                                                                                       |     ||             /                                                                                                                                                                                                    /           /                                                     2                           3                                                                  /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /                                                     2                           3                                                                                                                                                                                                                                                       |
         ||            /                                                                                                                                                                                                    /           /  /              2            3                      \    /                2     \                                                                  /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /  /              2            3                      \    /                2     \                                                                                                                                                                                                                                                        |     ||            /                                                                                                                                                                                                    /           /  /              2            3                      \    /                2     \                                                                  /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /  /              2            3                      \    /                2     \                                                                                                                                                                                                                                                        |
         ||           /                                                                                                                                                                                                    /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                 /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                                                                                                                                                                                        |     ||           /                                                                                                                                                                                                    /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                 /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /   |  /  53   2*f\    /  2   f\    /  2   f\ /92   f \|    |       /  2   f\      |                                                                                                                                                                                                                                                        |
         ||          /                                                                                                                                                                                                    /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                 /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                                                                                                                                                                                         |     ||          /                                                                                                                                                                                                    /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                 /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /    |  |- -- - ---|    |- - - -|    |- - - -|*|-- - --||    |       |- - - -|      |                 2            3                                                                                                                                                                                                                         |
         ||         /                                                                                                                                                                                                    /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \          /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                                                                                                                                                   |     ||         /                                                                                                                                                                                                    /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \          /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /     |  \  27    9 /    \  3   3/    \  3   3/ \27   27/|    |  92   \  3   3/    f |     /  53   2*f\    /  2   f\    /  2   f\ /92   f \                                                                                                                                                                                                   |
         ||        /                                                                                                                                                                                                    /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|         /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                                                                                                                                                   |     ||        /                                                                                                                                                                                                    /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|         /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /      |- ------------- - ---------- + -------------------|    |- -- - ---------- + --|     |- -- - ---|    |- - - -|    |- - - -|*|-- - --|                                                                                                                                                                                                   |
         ||       /                                                                                                                                                                                                    /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/        /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/                                                                                                                                                                                                   |     ||       /                                                                                                                                                                                                    /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/        /                                                                                                                                                                                                             /                                                                                                                                                                                                    /           /       \        8            108                3         /    \  27       12       27/     \  27    9 /    \  3   3/    \  3   3/ \27   27/                                                                                                                                                                                                   |
         ||      /                                                                                                                                                                                                3*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------       /                                                                                                                                                                                                             /                                                                                                                                                                                                3*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------                                                                                                                                                                                                   |     ||      /                                                                                                                                                                                                3*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------       /                                                                                                                                                                                                             /                                                                                                                                                                                                3*3 /           /        ----------------------------------------------------- + -------------------------  + ------------- + ---------- - -------------------                                                                                                                                                                                                   |
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$$x_{4} = \operatorname{re}{\left(\begin{cases} \frac{\sqrt{\frac{2 f}{9} - 2 \sqrt[3]{\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}} + \frac{4}{9}}}{2} + \frac{\sqrt{\frac{4 f}{9} - \frac{- \frac{4 f}{9} - \frac{106}{27}}{\sqrt{\frac{2 f}{9} - 2 \sqrt[3]{\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}} + \frac{4}{9}}} + 2 \sqrt[3]{\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}} + \frac{8}{9}}}{2} + \frac{1}{3} & \text{for}\: - \frac{f}{27} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} + \frac{92}{27} = 0 \\\frac{\sqrt{\frac{2 f}{9} - \frac{2 \left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)}{3 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}}} + 2 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}} + \frac{4}{9}}}{2} + \frac{\sqrt{\frac{4 f}{9} - \frac{- \frac{4 f}{9} - \frac{106}{27}}{\sqrt{\frac{2 f}{9} - \frac{2 \left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)}{3 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}}} + 2 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}} + \frac{4}{9}}} + \frac{2 \left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)}{3 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}}} - 2 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}} + \frac{8}{9}}}{2} + \frac{1}{3} & \text{otherwise} \end{cases}\right)} + i \operatorname{im}{\left(\begin{cases} \frac{\sqrt{\frac{2 f}{9} - 2 \sqrt[3]{\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}} + \frac{4}{9}}}{2} + \frac{\sqrt{\frac{4 f}{9} - \frac{- \frac{4 f}{9} - \frac{106}{27}}{\sqrt{\frac{2 f}{9} - 2 \sqrt[3]{\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}} + \frac{4}{9}}} + 2 \sqrt[3]{\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}} + \frac{8}{9}}}{2} + \frac{1}{3} & \text{for}\: - \frac{f}{27} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} + \frac{92}{27} = 0 \\\frac{\sqrt{\frac{2 f}{9} - \frac{2 \left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)}{3 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}}} + 2 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}} + \frac{4}{9}}}{2} + \frac{\sqrt{\frac{4 f}{9} - \frac{- \frac{4 f}{9} - \frac{106}{27}}{\sqrt{\frac{2 f}{9} - \frac{2 \left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)}{3 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}}} + 2 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}} + \frac{4}{9}}} + \frac{2 \left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)}{3 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}}} - 2 \sqrt[3]{- \frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{6} + \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{216} + \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{16} + \sqrt{\frac{\left(\frac{f}{27} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{2}}{12} - \frac{92}{27}\right)^{3}}{27} + \frac{\left(\frac{\left(\frac{92}{27} - \frac{f}{27}\right) \left(- \frac{f}{3} - \frac{2}{3}\right)}{3} - \frac{\left(- \frac{f}{3} - \frac{2}{3}\right)^{3}}{108} - \frac{\left(- \frac{2 f}{9} - \frac{53}{27}\right)^{2}}{8}\right)^{2}}{4}}} + \frac{8}{9}}}{2} + \frac{1}{3} & \text{otherwise} \end{cases}\right)}$$
x4 = re(Piecewise((sqrt(2*f/9 - 2*((92/27 - f/27)*(-f/3 - 2/3)/3 - (-f/3 - 2/3)^3/108 - (-2*f/9 - 53/27)^2/8)^(1/3) + 4/9)/2 + sqrt(4*f/9 - (-4*f/9 - 106/27)/sqrt(2*f/9 - 2*((92/27 - f/27)*(-f/3 - 2/3)/3 - (-f/3 - 2/3)^3/108 - (-2*f/9 - 53/27)^2/8)^(1/3) + 4/9) + 2*((92/27 - f/27)*(-f/3 - 2/3)/3 - (-f/3 - 2/3)^3/108 - (-2*f/9 - 53/27)^2/8)^(1/3) + 8/9/2 + 1/3, -f/27 + (-f/3 - 2/3)^2/12 + 92/27 = 0), (sqrt(2*f/9 - 2*(f/27 - (-f/3 - 2/3)^2/12 - 92/27)/(3*(-(92/27 - f/27)*(-f/3 - 2/3)/6 + (-f/3 - 2/3)^3/216 + (-2*f/9 - 53/27)^2/16 + sqrt((f/27 - (-f/3 - 2/3)^2/12 - 92/27)^3/27 + ((92/27 - f/27)*(-f/3 - 2/3)/3 - (-f/3 - 2/3)^3/108 - (-2*f/9 - 53/27)^2/8)^2/4))^(1/3)) + 2*(-(92/27 - f/27)*(-f/3 - 2/3)/6 + (-f/3 - 2/3)^3/216 + (-2*f/9 - 53/27)^2/16 + sqrt((f/27 - (-f/3 - 2/3)^2/12 - 92/27)^3/27 + ((92/27 - f/27)*(-f/3 - 2/3)/3 - (-f/3 - 2/3)^3/108 - (-2*f/9 - 53/27)^2/8)^2/4))^(1/3) + 4/9)/2 + sqrt(4*f/9 - (-4*f/9 - 106/27)/sqrt(2*f/9 - 2*(f/27 - (-f/3 - 2/3)^2/12 - 92/27)/(3*(-(92/27 - f/27)*(-f/3 - 2/3)/6 + (-f/3 - 2/3)^3/216 + (-2*f/9 - 53/27)^2/16 + sqrt((f/27 - (-f/3 - 2/3)^2/12 - 92/27)^3/27 + ((92/27 - f/27)*(-f/3 - 2/3)/3 - (-f/3 - 2/3)^3/108 - (-2*f/9 - 53/27)^2/8)^2/4))^(1/3)) + 2*(-(92/27 - f/27)*(-f/3 - 2/3)/6 + (-f/3 - 2/3)^3/216 + (-2*f/9 - 53/27)^2/16 + sqrt((f/27 - (-f/3 - 2/3)^2/12 - 92/27)^3/27 + ((92/27 - f/27)*(-f/3 - 2/3)/3 - (-f/3 - 2/3)^3/108 - (-2*f/9 - 53/27)^2/8)^2/4))^(1/3) + 4/9) + 2*(f/27 - (-f/3 - 2/3)^2/12 - 92/27)/(3*(-(92/27 - f/27)*(-f/3 - 2/3)/6 + (-f/3 - 2/3)^3/216 + (-2*f/9 - 53/27)^2/16 + sqrt((f/27 - (-f/3 - 2/3)^2/12 - 92/27)^3/27 + ((92/27 - f/27)*(-f/3 - 2/3)/3 - (-f/3 - 2/3)^3/108 - (-2*f/9 - 53/27)^2/8)^2/4))^(1/3)) - 2*(-(92/27 - f/27)*(-f/3 - 2/3)/6 + (-f/3 - 2/3)^3/216 + (-2*f/9 - 53/27)^2/16 + sqrt((f/27 - (-f/3 - 2/3)^2/12 - 92/27)^3/27 + ((92/27 - f/27)*(-f/3 - 2/3)/3 - (-f/3 - 2/3)^3/108 - (-2*f/9 - 53/27)^2/8)^2/4))^(1/3) + 8/9)/2 + 1/3, True))) + i*im(Piecewise((sqrt(2*f/9 - 2*((92/27 - f/27)*(-f/3 - 2/3)/3 - (-f/3 - 2/3)^3/108 - (-2*f/9 - 53/27)^2/8)^(1/3) + 4/9)/2 + sqrt(4*f/9 - (-4*f/9 - 106/27)/sqrt(2*f/9 - 2*((92/27 - f/27)*(-f/3 - 2/3)/3 - (-f/3 - 2/3)^3/108 - (-2*f/9 - 53/27)^2/8)^(1/3) + 4/9) + 2*((92/27 - f/27)*(-f/3 - 2/3)/3 - (-f/3 - 2/3)^3/108 - (-2*f/9 - 53/27)^2/8)^(1/3) + 8/9)/2 + 1/3, -f/27 + (-f/3 - 2/3)^2/12 + 92/27 = 0), (sqrt(2*f/9 - 2*(f/27 - (-f/3 - 2/3)^2/12 - 92/27)/(3*(-(92/27 - f/27)*(-f/3 - 2/3)/6 + (-f/3 - 2/3)^3/216 + (-2*f/9 - 53/27)^2/16 + sqrt((f/27 - (-f/3 - 2/3)^2/12 - 92/27)^3/27 + ((92/27 - f/27)*(-f/3 - 2/3)/3 - (-f/3 - 2/3)^3/108 - (-2*f/9 - 53/27)^2/8)^2/4))^(1/3)) + 2*(-(92/27 - f/27)*(-f/3 - 2/3)/6 + (-f/3 - 2/3)^3/216 + (-2*f/9 - 53/27)^2/16 + sqrt((f/27 - (-f/3 - 2/3)^2/12 - 92/27)^3/27 + ((92/27 - f/27)*(-f/3 - 2/3)/3 - (-f/3 - 2/3)^3/108 - (-2*f/9 - 53/27)^2/8)^2/4))^(1/3) + 4/9)/2 + sqrt(4*f/9 - (-4*f/9 - 106/27)/sqrt(2*f/9 - 2*(f/27 - (-f/3 - 2/3)^2/12 - 92/27)/(3*(-(92/27 - f/27)*(-f/3 - 2/3)/6 + (-f/3 - 2/3)^3/216 + (-2*f/9 - 53/27)^2/16 + sqrt((f/27 - (-f/3 - 2/3)^2/12 - 92/27)^3/27 + ((92/27 - f/27)*(-f/3 - 2/3)/3 - (-f/3 - 2/3)^3/108 - (-2*f/9 - 53/27)^2/8)^2/4))^(1/3)) + 2*(-(92/27 - f/27)*(-f/3 - 2/3)/6 + (-f/3 - 2/3)^3/216 + (-2*f/9 - 53/27)^2/16 + sqrt((f/27 - (-f/3 - 2/3)^2/12 - 92/27)^3/27 + ((92/27 - f/27)*(-f/3 - 2/3)/3 - (-f/3 - 2/3)^3/108 - (-2*f/9 - 53/27)^2/8)^2/4))^(1/3) + 4/9) + 2*(f/27 - (-f/3 - 2/3)^2/12 - 92/27)/(3*(-(92/27 - f/27)*(-f/3 - 2/3)/6 + (-f/3 - 2/3)^3/216 + (-2*f/9 - 53/27)^2/16 + sqrt((f/27 - (-f/3 - 2/3)^2/12 - 92/27)^3/27 + ((92/27 - f/27)*(-f/3 - 2/3)/3 - (-f/3 - 2/3)^3/108 - (-2*f/9 - 53/27)^2/8)^2/4))^(1/3)) - 2*(-(92/27 - f/27)*(-f/3 - 2/3)/6 + (-f/3 - 2/3)^3/216 + (-2*f/9 - 53/27)^2/16 + sqrt((f/27 - (-f/3 - 2/3)^2/12 - 92/27)^3/27 + ((92/27 - f/27)*(-f/3 - 2/3)/3 - (-f/3 - 2/3)^3/108 - (-2*f/9 - 53/27)^2/8)^2/4))^(1/3) + 8/9)/2 + 1/3, True))))