2
x
------ + 2*x*atan(x)
2
1 + x
$$\frac{x^{2}}{x^{2} + 1} + 2 x \operatorname{atan}{\left (x \right )}$$
/ 3 \
| x 2*x |
2*|- --------- + ------ + atan(x)|
| 2 2 |
| / 2\ 1 + x |
\ \1 + x / /
$$2 \left(- \frac{x^{3}}{\left(x^{2} + 1\right)^{2}} + \frac{2 x}{x^{2} + 1} + \operatorname{atan}{\left (x \right )}\right)$$
/ 2 4 \
| 7*x 4*x |
2*|3 - ------ + ---------|
| 2 2|
| 1 + x / 2\ |
\ \1 + x / /
--------------------------
2
1 + x
$$\frac{1}{x^{2} + 1} \left(\frac{8 x^{4}}{\left(x^{2} + 1\right)^{2}} - \frac{14 x^{2}}{x^{2} + 1} + 6\right)$$