/ / 3 2 2 \ \
| __________ | 3*x 2*atan (x) 3*atan(x) 6*x*atan (x) 4*x *atan(x)| |
| 4*\/ -1 + 2*x *|-atan(x) - ------ + ---------- + --------- - ------------ + ------------| |
| | 2 2 2 2 2 | / 2 \| 2
| 3 6*atan(x) \ 1 + x 1 + x 1 + x 1 + x 1 + x / 6*\1 + 2*atan (x) - 2*x*atan(x)/| atan (x)
|------------- - ---------------------- + ----------------------------------------------------------------------------------------- + --------------------------------|*e
| 5/2 / 2\ 3/2 2 2 |
|(-1 + 2*x) \1 + x /*(-1 + 2*x) / 2\ / 2\ __________ |
\ \1 + x / \1 + x / *\/ -1 + 2*x /