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