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