2 1
-2 + ----------- - ------------------
2 / 1 \ / 1 \ /1\
x *|1 + --| x*|1 + --|*acot|-|
| 2| | 2| \x/
\ x / \ x /
-------------------------------------
3 / 1 \ /1\
x *|1 + --|*acot|-|
| 2| \x/
\ x /
$$\frac{-2 - \frac{1}{x \left(1 + \frac{1}{x^{2}}\right) \operatorname{acot}{\left (\frac{1}{x} \right )}} + \frac{2}{x^{2} \left(1 + \frac{1}{x^{2}}\right)}}{x^{3} \left(1 + \frac{1}{x^{2}}\right) \operatorname{acot}{\left (\frac{1}{x} \right )}}$$
/ 7 4 1 3 3 \
2*|3 - ----------- + ------------ + --------------------- - -------------------- + ------------------|
| 2 / 1 \ 2 2 2 / 1 \ /1\|
| x *|1 + --| 4 / 1 \ 2 / 1 \ 2/1\ 3 / 1 \ /1\ x*|1 + --|*acot|-||
| | 2| x *|1 + --| x *|1 + --| *acot |-| x *|1 + --| *acot|-| | 2| \x/|
| \ x / | 2| | 2| \x/ | 2| \x/ \ x / |
\ \ x / \ x / \ x / /
------------------------------------------------------------------------------------------------------
4 / 1 \ /1\
x *|1 + --|*acot|-|
| 2| \x/
\ x /
$$\frac{1}{x^{4} \left(1 + \frac{1}{x^{2}}\right) \operatorname{acot}{\left (\frac{1}{x} \right )}} \left(6 + \frac{6}{x \left(1 + \frac{1}{x^{2}}\right) \operatorname{acot}{\left (\frac{1}{x} \right )}} - \frac{14}{x^{2} \left(1 + \frac{1}{x^{2}}\right)} + \frac{2}{x^{2} \left(1 + \frac{1}{x^{2}}\right)^{2} \operatorname{acot}^{2}{\left (\frac{1}{x} \right )}} - \frac{6}{x^{3} \left(1 + \frac{1}{x^{2}}\right)^{2} \operatorname{acot}{\left (\frac{1}{x} \right )}} + \frac{8}{x^{4} \left(1 + \frac{1}{x^{2}}\right)^{2}}\right)$$