/ 2 2 \
6 | 2 28 24*x*atan(x) 4*x *atan (x)|
18*atan (x)*|- atan (x) + ------ - ------------ + -------------|
| 2 2 2 |
\ 1 + x 1 + x 1 + x /
----------------------------------------------------------------
2
/ 2\
\1 + x /
$$\frac{18 \left(\frac{4 x^{2} \operatorname{atan}^{2}{\left(x \right)}}{x^{2} + 1} - \frac{24 x \operatorname{atan}{\left(x \right)}}{x^{2} + 1} - \operatorname{atan}^{2}{\left(x \right)} + \frac{28}{x^{2} + 1}\right) \operatorname{atan}^{6}{\left(x \right)}}{\left(x^{2} + 1\right)^{2}}$$