Simplify the expression: (2x2−3x+1)−(x2−5x+4)(2x^2 - 3x + 1) - (x^2 - 5x + 4)(2x2−3x+1)−(x2−5x+4)
x2+2x−3x^2 + 2x - 3x2+2x−3
x2−8x+5x^2 - 8x + 5x2−8x+5
3x2+2x−33x^2 + 2x - 33x2+2x−3
x2−2x+3x^2 - 2x + 3x2−2x+3