/ 2\
4*x*atan\x /
------------
4
1 + x $$\frac{4 x \operatorname{atan}{\left (x^{2} \right )}}{x^{4} + 1}$$
/ 2 4 / 2\ \
| 2*x 4*x *atan\x / / 2\|
4*|------ - ------------- + atan\x /|
| 4 4 |
\1 + x 1 + x /
-------------------------------------
4
1 + x $$\frac{1}{x^{4} + 1} \left(- \frac{16 x^{4} \operatorname{atan}{\left (x^{2} \right )}}{x^{4} + 1} + \frac{8 x^{2}}{x^{4} + 1} + 4 \operatorname{atan}{\left (x^{2} \right )}\right)$$
/ 4 6 / 2\\
| 12*x 2 / 2\ 16*x *atan\x /|
8*x*|3 - ------ - 10*x *atan\x / + --------------|
| 4 4 |
\ 1 + x 1 + x /
--------------------------------------------------
2
/ 4\
\1 + x / $$\frac{8 x}{\left(x^{4} + 1\right)^{2}} \left(\frac{16 x^{6} \operatorname{atan}{\left (x^{2} \right )}}{x^{4} + 1} - \frac{12 x^{4}}{x^{4} + 1} - 10 x^{2} \operatorname{atan}{\left (x^{2} \right )} + 3\right)$$