/ 3\
\1 + x /*atan(x)
----------------
7
((1 + x^3)*atan(x))/7
3 2 1 + x 3*x *atan(x) ---------- + ------------ / 2\ 7 7*\1 + x /
/ 3 \
| 1 + x 3*x |
2*x*|3*atan(x) - --------- + ------|
| 2 2|
| / 2\ 1 + x |
\ \1 + x / /
------------------------------------
7
/ / 2 \\
| / 3\ | 4*x ||
| \1 + x /*|-1 + ------||
| 3 | 2||
| 9*x 9*x \ 1 + x /|
2*|3*atan(x) - --------- + ------ + ----------------------|
| 2 2 2 |
| / 2\ 1 + x / 2\ |
\ \1 + x / \1 + x / /
-----------------------------------------------------------
7