Y'=(3x^2(1-x^3)-(1+x^3)(3x^2))/((1-x^3)^2)Y'=(3x^2-3x^5-3x^2-3x^5)/(1-2x^3+x^6)Y'=(-6x^5)/(1-2x^3+x^6)Y'=-6x^5/(1-x^3)^2
Y'=(3x^2(1-x^3)-(1+x^3)(3x^2))/((1-x^3)^2)
Y'=(3x^2-3x^5-3x^2-3x^5)/(1-2x^3+x^6)
Y'=(-6x^5)/(1-2x^3+x^6)
Y'=-6x^5/(1-x^3)^2