3
x 2
------ + 3*x *atan(x)
2
1 + x
$$\frac{x^{3}}{x^{2} + 1} + 3 x^{2} \operatorname{atan}{\left (x \right )}$$
/ 3 \
| x 3*x |
2*x*|3*atan(x) - --------- + ------|
| 2 2|
| / 2\ 1 + x |
\ \1 + x / /
$$2 x \left(- \frac{x^{3}}{\left(x^{2} + 1\right)^{2}} + \frac{3 x}{x^{2} + 1} + 3 \operatorname{atan}{\left (x \right )}\right)$$
/ 3 5 \
| 10*x 4*x 9*x |
2*|3*atan(x) - --------- + --------- + ------|
| 2 3 2|
| / 2\ / 2\ 1 + x |
\ \1 + x / \1 + x / /
$$2 \left(\frac{4 x^{5}}{\left(x^{2} + 1\right)^{3}} - \frac{10 x^{3}}{\left(x^{2} + 1\right)^{2}} + \frac{9 x}{x^{2} + 1} + 3 \operatorname{atan}{\left (x \right )}\right)$$