/ _____________ \ / _____________ \ / _____________ \
| / ____ / ___\ | | / ____ / ___\ | | / ____ |
| 1 / 25 \/ 69 | 1 I*\/ 3 | 1 | | 1 / 25 \/ 69 | 1 I*\/ 3 | 1 | | 1 / 25 \/ 69 1 |
|x + - - 3 / -- + ------ *|- - - -------| - ------------------------------------|*|x + - - 3 / -- + ------ *|- - + -------| - ------------------------------------|*|x + - - 3 / -- + ------ - --------------------|
| 3 \/ 54 18 \ 2 2 / _____________| | 3 \/ 54 18 \ 2 2 / _____________| | 3 \/ 54 18 _____________|
| / ___\ / ____ | | / ___\ / ____ | | / ____ |
| | 1 I*\/ 3 | / 25 \/ 69 | | | 1 I*\/ 3 | / 25 \/ 69 | | / 25 \/ 69 |
| 9*|- - - -------|*3 / -- + ------ | | 9*|- - + -------|*3 / -- + ------ | | 9*3 / -- + ------ |
\ \ 2 2 / \/ 54 18 / \ \ 2 2 / \/ 54 18 / \ \/ 54 18 /
$$\left(x + \left(\frac{1}{3} - \frac{1}{9 \left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right) \sqrt[3]{\frac{\sqrt{69}}{18} + \frac{25}{54}}} - \left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right) \sqrt[3]{\frac{\sqrt{69}}{18} + \frac{25}{54}}\right)\right) \left(x + \left(\frac{1}{3} - \left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right) \sqrt[3]{\frac{\sqrt{69}}{18} + \frac{25}{54}} - \frac{1}{9 \left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right) \sqrt[3]{\frac{\sqrt{69}}{18} + \frac{25}{54}}}\right)\right) \left(x + \left(- \sqrt[3]{\frac{\sqrt{69}}{18} + \frac{25}{54}} - \frac{1}{9 \sqrt[3]{\frac{\sqrt{69}}{18} + \frac{25}{54}}} + \frac{1}{3}\right)\right)$$
((x + 1/3 - (25/54 + sqrt(69)/18)^(1/3)*(-1/2 - i*sqrt(3)/2) - 1/(9*(-1/2 - i*sqrt(3)/2)*(25/54 + sqrt(69)/18)^(1/3)))*(x + 1/3 - (25/54 + sqrt(69)/18)^(1/3)*(-1/2 + i*sqrt(3)/2) - 1/(9*(-1/2 + i*sqrt(3)/2)*(25/54 + sqrt(69)/18)^(1/3))))*(x + 1/3 - (25/54 + sqrt(69)/18)^(1/3) - 1/(9*(25/54 + sqrt(69)/18)^(1/3)))