x
- ------ + acot(x)
2
1 + x
$$- \frac{x}{x^{2} + 1} + \operatorname{acot}{\left (x \right )}$$
/ 2 \
| x |
2*|-1 + ------|
| 2|
\ 1 + x /
---------------
2
1 + x
$$\frac{\frac{2 x^{2}}{x^{2} + 1} - 2}{x^{2} + 1}$$
/ 2 \
| x |
8*x*|1 - ------|
| 2|
\ 1 + x /
----------------
2
/ 2\
\1 + x /
$$\frac{8 x}{\left(x^{2} + 1\right)^{2}} \left(- \frac{x^{2}}{x^{2} + 1} + 1\right)$$