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