4
x 3
- ------ + 4*x *acot(x)
2
1 + x
$$- \frac{x^{4}}{x^{2} + 1} + 4 x^{3} \operatorname{acot}{\left(x \right)}$$
/ 3 \
2 | x 4*x |
2*x *|6*acot(x) + --------- - ------|
| 2 2|
| / 2\ 1 + x |
\ \1 + x / /
$$2 x^{2} \left(\frac{x^{3}}{\left(x^{2} + 1\right)^{2}} - \frac{4 x}{x^{2} + 1} + 6 \operatorname{acot}{\left(x \right)}\right)$$
/ / 2 \\
| 3 | 4*x ||
| x *|-1 + ------||
| 3 | 2||
| 18*x 12*x \ 1 + x /|
2*x*|12*acot(x) - ------ + --------- - ----------------|
| 2 2 2 |
| 1 + x / 2\ / 2\ |
\ \1 + x / \1 + x / /
$$2 x \left(- \frac{x^{3} \cdot \left(\frac{4 x^{2}}{x^{2} + 1} - 1\right)}{\left(x^{2} + 1\right)^{2}} + \frac{12 x^{3}}{\left(x^{2} + 1\right)^{2}} - \frac{18 x}{x^{2} + 1} + 12 \operatorname{acot}{\left(x \right)}\right)$$