/ / 2 2 \ \
| 3 | 1 2 12*x*atan(2*x) 16*x *atan (2*x)| |
| 2*sin (3*x)*|-------- - atan (2*x) - -------------- + ----------------| |
| | 2 2 2 | 2 / 2 2 \ 2 |
| 3 / 2 2 \ \1 + 4*x 1 + 4*x 1 + 4*x / 27*atan (2*x)*\sin (3*x) - 3*cos (3*x)/*sin(3*x) 36*sin (3*x)*(-1 + 2*x*atan(2*x))*atan(2*x)*cos(3*x)|
24*|- 9*atan (2*x)*\- 3*cos (3*x) + 5*sin (3*x)/*cos(3*x) + ----------------------------------------------------------------------- - ------------------------------------------------ - ----------------------------------------------------|*sin(3*x)
| 2 2 2 |
| / 2\ 1 + 4*x / 2\ |
\ \1 + 4*x / \1 + 4*x / /