Simplify: x2(x−1)+x(x−1)x^2(x - 1) + x(x - 1)x2(x−1)+x(x−1).
x3−xx^3 - xx3−x
x3−x2x^3 - x^2x3−x2
x3+x2x^3 + x^2x3+x2
x3x^3x3