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