Simplify: (2x2−5x+3)−(x2−5x+3)(2x^2 - 5x + 3) - (x^2 - 5x + 3)(2x2−5x+3)−(x2−5x+3).
x2x^2x2
x2−10x+6x^2 - 10x + 6x2−10x+6
3x23x^23x2
x2−6x^2 - 6x2−6