y = 4sinx * 3cosxy' = 12(cosx*cosx + sinx*(-sinx))= 12(cos²x-sin²x)= 12cos2xy = sinx / xy' = (xcosx - sinx)/x²y = xlnxy' = lnx + x(1/x)= lnx + 1y = log(3^x*e^x) = log(3e)^x = log(3e) * ...