2/ 3\ 2 / 3\
atan \x / 6*x *atan\x /*log(x + 1)
--------- + ------------------------
x + 1 6
1 + x
$$\frac{6 x^{2} \log{\left(x + 1 \right)} \operatorname{atan}{\left(x^{3} \right)}}{x^{6} + 1} + \frac{\operatorname{atan}^{2}{\left(x^{3} \right)}}{x + 1}$$
/ 3 6 / 3\\
| / 3\ 3*x 6*x *atan\x /|
6*x*|2*atan\x / + ------ - -------------|*log(1 + x)
2/ 3\ | 6 6 | 2 / 3\
atan \x / \ 1 + x 1 + x / 12*x *atan\x /
- --------- + ---------------------------------------------------- + ----------------
2 6 / 6\
(1 + x) 1 + x (1 + x)*\1 + x /
$$\frac{12 x^{2} \operatorname{atan}{\left(x^{3} \right)}}{\left(x + 1\right) \left(x^{6} + 1\right)} + \frac{6 x \left(- \frac{6 x^{6} \operatorname{atan}{\left(x^{3} \right)}}{x^{6} + 1} + \frac{3 x^{3}}{x^{6} + 1} + 2 \operatorname{atan}{\left(x^{3} \right)}\right) \log{\left(x + 1 \right)}}{x^{6} + 1} - \frac{\operatorname{atan}^{2}{\left(x^{3} \right)}}{\left(x + 1\right)^{2}}$$
/ / 9 3 6 / 3\ 12 / 3\ \ \
| | 27*x 9*x 27*x *atan\x / 36*x *atan\x / / 3\| / 3 6 / 3\\|
| 6*|- --------- + ------ - -------------- + --------------- + atan\x /|*log(1 + x) | / 3\ 3*x 6*x *atan\x /||
| | 2 6 6 2 | 9*x*|2*atan\x / + ------ - -------------||
| 2/ 3\ | / 6\ 1 + x 1 + x / 6\ | 2 / 3\ | 6 6 ||
|atan \x / \ \1 + x / \1 + x / / 9*x *atan\x / \ 1 + x 1 + x /|
2*|--------- + --------------------------------------------------------------------------------- - ----------------- + -----------------------------------------|
| 3 6 2 / 6\ / 6\ |
\ (1 + x) 1 + x (1 + x) *\1 + x / (1 + x)*\1 + x / /
$$2 \left(- \frac{9 x^{2} \operatorname{atan}{\left(x^{3} \right)}}{\left(x + 1\right)^{2} \left(x^{6} + 1\right)} + \frac{9 x \left(- \frac{6 x^{6} \operatorname{atan}{\left(x^{3} \right)}}{x^{6} + 1} + \frac{3 x^{3}}{x^{6} + 1} + 2 \operatorname{atan}{\left(x^{3} \right)}\right)}{\left(x + 1\right) \left(x^{6} + 1\right)} + \frac{6 \left(\frac{36 x^{12} \operatorname{atan}{\left(x^{3} \right)}}{\left(x^{6} + 1\right)^{2}} - \frac{27 x^{9}}{\left(x^{6} + 1\right)^{2}} - \frac{27 x^{6} \operatorname{atan}{\left(x^{3} \right)}}{x^{6} + 1} + \frac{9 x^{3}}{x^{6} + 1} + \operatorname{atan}{\left(x^{3} \right)}\right) \log{\left(x + 1 \right)}}{x^{6} + 1} + \frac{\operatorname{atan}^{2}{\left(x^{3} \right)}}{\left(x + 1\right)^{3}}\right)$$