/ 2 2 \
| 2 3 18*x*atan(2*x) 16*x *atan (2*x)|
64*|- atan (2*x) + -------- - -------------- + ----------------|*atan(2*x)
| 2 2 2 |
\ 1 + 4*x 1 + 4*x 1 + 4*x /
--------------------------------------------------------------------------
2
/ 2\
\1 + 4*x /
$$\frac{64 \left(\frac{16 x^{2} \operatorname{atan}^{2}{\left(2 x \right)}}{4 x^{2} + 1} - \frac{18 x \operatorname{atan}{\left(2 x \right)}}{4 x^{2} + 1} - \operatorname{atan}^{2}{\left(2 x \right)} + \frac{3}{4 x^{2} + 1}\right) \operatorname{atan}{\left(2 x \right)}}{\left(4 x^{2} + 1\right)^{2}}$$