Ответ (Неопределённый)
[src] /
| 2 2
| 2 2*x*sin (log(x)) 3*x*cos (log(x)) 2*x*cos(log(x))*sin(log(x))
| cos (log(x)) dx = C + ---------------- + ---------------- + ---------------------------
| 5 5 5
/
$${{2\,x\,\sin \left(2\,\log x\right)+x\,\cos \left(2\,\log x\right)+
5\,x}\over{10}}$$