Simplify: 2(x2−4)−(x2−8)2(x^2 - 4) - (x^2 - 8)2(x2−4)−(x2−8).
x2x^2x2
x2−16x^2 - 16x2−16
3x2−163x^2 - 163x2−16
x2+16x^2 + 16x2+16