/ 2 2 \
15/2 | 2 323 4*x *atan (x) 57*x*atan(x)|
21*atan (x)*|- atan (x) + ---------- + ------------- - ------------|
| / 2\ 2 / 2\ |
\ 8*\1 + x / 1 + x 2*\1 + x / /
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2
/ 2\
\1 + x /
$$\frac{21 \left(\frac{4 x^{2} \operatorname{atan}^{2}{\left(x \right)}}{x^{2} + 1} - \frac{57 x \operatorname{atan}{\left(x \right)}}{2 \left(x^{2} + 1\right)} - \operatorname{atan}^{2}{\left(x \right)} + \frac{323}{8 \left(x^{2} + 1\right)}\right) \operatorname{atan}^{\frac{15}{2}}{\left(x \right)}}{\left(x^{2} + 1\right)^{2}}$$