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