2
x atan(x) 2*x *atan(x)
--------- + ------- - ------------
2 2 2
/ 2\ 1 + x / 2\
\1 + x / \1 + x /
$$- \frac{2 x^{2} \operatorname{atan}{\left(x \right)}}{\left(x^{2} + 1\right)^{2}} + \frac{\operatorname{atan}{\left(x \right)}}{x^{2} + 1} + \frac{x}{\left(x^{2} + 1\right)^{2}}$$
/ 2 / 2 \ \
| 3*x | 4*x | |
2*|1 - ------ - 2*x*atan(x) + x*|-1 + ------|*atan(x)|
| 2 | 2| |
\ 1 + x \ 1 + x / /
------------------------------------------------------
2
/ 2\
\1 + x /
$$\frac{2 \left(x \left(\frac{4 x^{2}}{x^{2} + 1} - 1\right) \operatorname{atan}{\left(x \right)} - 2 x \operatorname{atan}{\left(x \right)} - \frac{3 x^{2}}{x^{2} + 1} + 1\right)}{\left(x^{2} + 1\right)^{2}}$$
/ / 2 \ / 2 \ \
| | 4*x | 2 | 2*x | |
| 4*x*|-1 + ------| 12*x *|-1 + ------|*atan(x)|
| / 2 \ 3 | 2| | 2| |
| 9*x | 4*x | 6*x \ 1 + x / \ 1 + x / |
2*|- ------ + 3*|-1 + ------|*atan(x) + --------- + ----------------- - ---------------------------|
| 2 | 2| 2 2 2 |
| 1 + x \ 1 + x / / 2\ 1 + x 1 + x |
\ \1 + x / /
----------------------------------------------------------------------------------------------------
2
/ 2\
\1 + x /
$$\frac{2 \cdot \left(- \frac{12 x^{2} \cdot \left(\frac{2 x^{2}}{x^{2} + 1} - 1\right) \operatorname{atan}{\left(x \right)}}{x^{2} + 1} + 3 \cdot \left(\frac{4 x^{2}}{x^{2} + 1} - 1\right) \operatorname{atan}{\left(x \right)} + \frac{6 x^{3}}{\left(x^{2} + 1\right)^{2}} + \frac{4 x \left(\frac{4 x^{2}}{x^{2} + 1} - 1\right)}{x^{2} + 1} - \frac{9 x}{x^{2} + 1}\right)}{\left(x^{2} + 1\right)^{2}}$$