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