/ 6*sin(3*x) (-1 + 2*x)*cos(3*x)\ atan(x)
-|9*cos(3*x) + ---------- + -------------------|*e
| 2 2 |
| 1 + x / 2\ |
\ \1 + x / /
$$- \left(\frac{\left(2 x - 1\right) \cos{\left(3 x \right)}}{\left(x^{2} + 1\right)^{2}} + 9 \cos{\left(3 x \right)} + \frac{6 \sin{\left(3 x \right)}}{x^{2} + 1}\right) e^{\operatorname{atan}{\left(x \right)}}$$
/ / 2 \ \
| | 1 6*x 8*x | |
| |-2 + ------ - ------ + ------|*cos(3*x) |
| | 2 2 2| |
| 27*cos(3*x) \ 1 + x 1 + x 1 + x / 9*(-1 + 2*x)*sin(3*x)| atan(x)
|27*sin(3*x) - ----------- + ---------------------------------------- + ---------------------|*e
| 2 2 2 |
| 1 + x / 2\ / 2\ |
\ \1 + x / \1 + x / /
$$\left(\frac{9 \left(2 x - 1\right) \sin{\left(3 x \right)}}{\left(x^{2} + 1\right)^{2}} + 27 \sin{\left(3 x \right)} - \frac{27 \cos{\left(3 x \right)}}{x^{2} + 1} + \frac{\left(\frac{8 x^{2}}{x^{2} + 1} - \frac{6 x}{x^{2} + 1} - 2 + \frac{1}{x^{2} + 1}\right) \cos{\left(3 x \right)}}{\left(x^{2} + 1\right)^{2}}\right) e^{\operatorname{atan}{\left(x \right)}}$$