Question 1119168
simplify {{{(x^3-x^2)/(1-x^3)}}} = {{{x^2(x-1)/(1-x^3)}}} 
Factor out -1
{{{x^2(x-1)/-1(x^3-1)}}} 
the difference of cubes = 
{{{x^2(x-1)/(-1(x-1)(x^2+x+1))}}} 
Cancel (x-1)
{{{x^2/-1(x^2+x+1)}}} = {{{-x^2/(x^2+x+1)}}}