Ответ
(12*sin(3)-34*cos(3))/27+7/27
1 / | | / 2 \ 7 34*cos(3) 4*sin(3) | \x + 2*x + 1/*sin(3*x) dx = -- - --------- + -------- | 27 27 9 / 0
$${{12\,\sin 3-34\,\cos 3}\over{27}}+{{7}\over{27}}$$