/ / 2 \\
| 2/3 | 4*x ||
| x *|-1 + ------||
| 2/3 | 2||
| 2*x 1 4*acot(x) \ 1 + x /|
2*|--------- + --------------- + --------- - ------------------|
| 2 4/3 / 2\ 7/3 2 |
|/ 2\ 3*x *\1 + x / 27*x / 2\ |
\\1 + x / \1 + x / /
$$2 \left(- \frac{x^{\frac{2}{3}} \left(\frac{4 x^{2}}{x^{2} + 1} - 1\right)}{\left(x^{2} + 1\right)^{2}} + \frac{2 x^{\frac{2}{3}}}{\left(x^{2} + 1\right)^{2}} + \frac{1}{3 x^{\frac{4}{3}} \left(x^{2} + 1\right)} + \frac{4 \operatorname{acot}{\left(x \right)}}{27 x^{\frac{7}{3}}}\right)$$