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