/ 2\ x*atan\3*x /
x*atan(3*x^2)
2
6*x / 2\
-------- + atan\3*x /
4
1 + 9*x
/ 4 \
| 36*x |
6*x*|3 - --------|
| 4|
\ 1 + 9*x /
------------------
4
1 + 9*x
/ / 4 \\
| 4 | 72*x ||
| 12*x *|-5 + --------||
| 4 | 4||
| 36*x \ 1 + 9*x /|
18*|1 - -------- + ---------------------|
| 4 4 |
\ 1 + 9*x 1 + 9*x /
-----------------------------------------
4
1 + 9*x