原式 = 积分[0,x^2] sin[xy] / y dy - 积分[0,x] sin[xy] / y dy求导：( 积分[0,x^2] sin[xy] / y dy ) ' = sin[x^3] / x^2 * (x^2) ' + 积分[0,x^2] (sin[xy])' / y dy = 2sin[x^3] / x + 积分[0,x^2] cos[xy] dy =...