>>902
dI(x)/dx=3x^2*cos(x^4)/x^3-cos(x^2)/x-∫[t=x,x^3] sin(xt)dt
=(3/x)cos(x^4)-cos(x^2)/x+[cos(xt)/x][t=x,x^3]
=(3/x)cos(x^4)-cos(x^2)/x+cos(x^4)/x-cos(x^2)/x
=(4/x)cos(x^4)-(2/x)cos(x^2)