2
9*atan (3*x)
- ------------ + atan(g2)
2
1 + 9*x
$$\operatorname{atan}{\left(g_{2} \right)} - \frac{9 \operatorname{atan}^{2}{\left(3 x \right)}}{9 x^{2} + 1}$$
54*(-1 + 3*x*atan(3*x))*atan(3*x)
---------------------------------
2
/ 2\
\1 + 9*x /
$$\frac{54 \left(3 x \operatorname{atan}{\left(3 x \right)} - 1\right) \operatorname{atan}{\left(3 x \right)}}{\left(9 x^{2} + 1\right)^{2}}$$
/ 2 2 \
| 2 1 36*x *atan (3*x) 18*x*atan(3*x)|
162*|atan (3*x) - -------- - ---------------- + --------------|
| 2 2 2 |
\ 1 + 9*x 1 + 9*x 1 + 9*x /
---------------------------------------------------------------
2
/ 2\
\1 + 9*x /
$$\frac{162 \left(- \frac{36 x^{2} \operatorname{atan}^{2}{\left(3 x \right)}}{9 x^{2} + 1} + \frac{18 x \operatorname{atan}{\left(3 x \right)}}{9 x^{2} + 1} + \operatorname{atan}^{2}{\left(3 x \right)} - \frac{1}{9 x^{2} + 1}\right)}{\left(9 x^{2} + 1\right)^{2}}$$