(7x-3)(2x-5) -2(4x-3)^2
= 14x^2 - 35x - 6x + 15 - 2(16x^2 - 24x + 9)
= 14x^2 - 41x + 15 - 32x^2 + 48x - 18
= -18x^2 + 7x - 3