3
-4*acot (x)
-----------
2
1 + x
$$- \frac{4 \operatorname{acot}^{3}{\left(x \right)}}{x^{2} + 1}$$
2
4*acot (x)*(3 + 2*x*acot(x))
----------------------------
2
/ 2\
\1 + x /
$$\frac{4 \cdot \left(2 x \operatorname{acot}{\left(x \right)} + 3\right) \operatorname{acot}^{2}{\left(x \right)}}{\left(x^{2} + 1\right)^{2}}$$
/ 2 2 \
| 2 3 9*x*acot(x) 4*x *acot (x)|
8*|acot (x) - ------ - ----------- - -------------|*acot(x)
| 2 2 2 |
\ 1 + x 1 + x 1 + x /
-----------------------------------------------------------
2
/ 2\
\1 + x /
$$\frac{8 \left(- \frac{4 x^{2} \operatorname{acot}^{2}{\left(x \right)}}{x^{2} + 1} - \frac{9 x \operatorname{acot}{\left(x \right)}}{x^{2} + 1} + \operatorname{acot}^{2}{\left(x \right)} - \frac{3}{x^{2} + 1}\right) \operatorname{acot}{\left(x \right)}}{\left(x^{2} + 1\right)^{2}}$$