Simplify: 3(x2+2x)−2x23(x^2 + 2x) - 2x^23(x2+2x)−2x2.
x2+6xx^2 + 6xx2+6x
x2+2xx^2 + 2xx2+2x
5x2+6x5x^2 + 6x5x2+6x
3x2+4x3x^2 + 4x3x2+4x