Helpme with integrates 5★★★★★ down link

http://imageshack.us/photo/my-images/841/integrales2.png/

Integrating 85*x*cos(170*x) I get:
(170*x*sin(170*x)+cos(170*x))/340
Integrating x*sin(85*x) I get
(sin(85*x)-85*x*cos(85*x))/7225
Hope it helps.