y' = (3x^2 e^x - x^3 e^x)/(e^x)^2y' = (3x^2 - x^3) / e^x
y' = (1/(2x^2)) * 4xy' = (4)/(2x)y' = 2/x
y' = -3*sin(3x)
y' = (3x^2 e^x - x^3 e^x)/(e^x)^2
y' = (3x^2 - x^3) / e^x
y' = (1/(2x^2)) * 4x
y' = (4)/(2x)
y' = 2/x
y' = -3*sin(3x)