Simplify: (2x+5)(x−1)−2x2(2x + 5)(x - 1) - 2x^2(2x+5)(x−1)−2x2.
3x−53x - 53x−5
3x+53x + 53x+5
x−5x - 5x−5
x2+3x−5x^2 + 3x - 5x2+3x−5