/ 2 \
| 4*x 21 18*x |
10*|-1 + ------ + ----------------- - ----------------|
| 2 / 2\ 2 / 2\ |
\ 1 + x \1 + x /*acot (x) \1 + x /*acot(x)/
-------------------------------------------------------
2
/ 2\ 6
\1 + x / *acot (x)
$$\frac{1}{\left(x^{2} + 1\right)^{2} \operatorname{acot}^{6}{\left (x \right )}} \left(\frac{40 x^{2}}{x^{2} + 1} - \frac{180 x}{\left(x^{2} + 1\right) \operatorname{acot}{\left (x \right )}} - 10 + \frac{210}{\left(x^{2} + 1\right) \operatorname{acot}^{2}{\left (x \right )}}\right)$$