/ 2 \
| 1 6*(-1 + x) 8*(-1 + x) |
| -2 + ------------- - ------------- + ------------- |
| 2 2 2 |
| 6 1 + (-1 + x) 1 + (-1 + x) 1 + (-1 + x) 6 3*(-3 + 2*x) | atan(-1 + x)
|- -------- + -------------------------------------------------- + ------------------------ + ------------------------|*e
| 3 2 2 / 2\ 2|
| (1 + x) / 2\ (1 + x) *\1 + (-1 + x) / / 2\ |
\ \1 + (-1 + x) / (1 + x)*\1 + (-1 + x) / /
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1 + x