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