/ 2 \
| 1 16*x 6*x |
16*|-1 + --------------------- + -------- + --------------------|
| / 2\ 2 2 / 2\ |
\ \1 + 4*x /*atan (2*x) 1 + 4*x \1 + 4*x /*atan(2*x)/
-----------------------------------------------------------------
2
/ 2\
\1 + 4*x / *atan(2*x)
$$\frac{1}{\left(4 x^{2} + 1\right)^{2} \operatorname{atan}{\left (2 x \right )}} \left(\frac{256 x^{2}}{4 x^{2} + 1} + \frac{96 x}{\left(4 x^{2} + 1\right) \operatorname{atan}{\left (2 x \right )}} - 16 + \frac{16}{\left(4 x^{2} + 1\right) \operatorname{atan}^{2}{\left (2 x \right )}}\right)$$