Simplify: 2x2(x+3)−3x(x2−2)2x^2(x + 3) - 3x(x^2 - 2)2x2(x+3)−3x(x2−2).
−x3+6x2+6x-x^3 + 6x^2 + 6x−x3+6x2+6x
−x3+6x2−6x-x^3 + 6x^2 - 6x−x3+6x2−6x
x3+6x2+6xx^3 + 6x^2 + 6xx3+6x2+6x
−x3−6x2+6x-x^3 - 6x^2 + 6x−x3−6x2+6x