(x^3 + 1)(1/3x^(-2/3)) - (3x^2)(x^(1/3))/(x^3 + 1)^2 to (x^3 + 1) - x(9x^2)/(3x^(2/3)(x^3 +1) how do i get x(9x^2)??? i understand how to get the denominator part but the top seems like it is -3x^(7/3) can someone please explain?
