3 2
cos (x) 3*cos (x)*atan(x)*sin(x)
---------- - ------------------------
/ 2\ 2
2*\1 + x /
$$- \frac{3 \sin{\left(x \right)} \cos^{2}{\left(x \right)} \operatorname{atan}{\left(x \right)}}{2} + \frac{\cos^{3}{\left(x \right)}}{2 \left(x^{2} + 1\right)}$$
/ / 2 2 \ 2 \
|3*\- cos (x) + 2*sin (x)/*atan(x) x*cos (x) 3*cos(x)*sin(x)|
|--------------------------------- - --------- - ---------------|*cos(x)
| 2 2 2 |
| / 2\ 1 + x |
\ \1 + x / /
$$\left(- \frac{x \cos^{2}{\left(x \right)}}{\left(x^{2} + 1\right)^{2}} + \frac{3 \left(2 \sin^{2}{\left(x \right)} - \cos^{2}{\left(x \right)}\right) \operatorname{atan}{\left(x \right)}}{2} - \frac{3 \sin{\left(x \right)} \cos{\left(x \right)}}{x^{2} + 1}\right) \cos{\left(x \right)}$$
/ 2 \
3 | 4*x |
cos (x)*|-1 + ------|
| 2| / 2 2 \ / 2 2 \ 2
\ 1 + x / 3*\- 7*cos (x) + 2*sin (x)/*atan(x)*sin(x) 9*\- cos (x) + 2*sin (x)/*cos(x) 9*x*cos (x)*sin(x)
--------------------- - ------------------------------------------ + -------------------------------- + ------------------
2 2 / 2\ 2
/ 2\ 2*\1 + x / / 2\
\1 + x / \1 + x /
$$\frac{9 x \sin{\left(x \right)} \cos^{2}{\left(x \right)}}{\left(x^{2} + 1\right)^{2}} - \frac{3 \left(2 \sin^{2}{\left(x \right)} - 7 \cos^{2}{\left(x \right)}\right) \sin{\left(x \right)} \operatorname{atan}{\left(x \right)}}{2} + \frac{9 \left(2 \sin^{2}{\left(x \right)} - \cos^{2}{\left(x \right)}\right) \cos{\left(x \right)}}{2 \left(x^{2} + 1\right)} + \frac{\left(\frac{4 x^{2}}{x^{2} + 1} - 1\right) \cos^{3}{\left(x \right)}}{\left(x^{2} + 1\right)^{2}}$$