/ 2 \
| 16*x |
16*|-1 + --------|*sin(3*x)
| 2|
54*sin(3*x) 144*x*cos(3*x) \ 1 + 4*x /
- ----------- - 27*atan(2*x)*cos(3*x) - -------------- + ---------------------------
2 2 2
1 + 4*x / 2\ / 2\
\1 + 4*x / \1 + 4*x /
$$- \frac{144 x \cos{\left(3 x \right)}}{\left(4 x^{2} + 1\right)^{2}} - 27 \cos{\left(3 x \right)} \operatorname{atan}{\left(2 x \right)} - \frac{54 \sin{\left(3 x \right)}}{4 x^{2} + 1} + \frac{16 \left(\frac{16 x^{2}}{4 x^{2} + 1} - 1\right) \sin{\left(3 x \right)}}{\left(4 x^{2} + 1\right)^{2}}$$