(5x²+3x-7)(x-1)-(2x²+3x-4)(2x-3)
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ANSWER:
=(5x^2+3x-7)(x-1)-(2x^2+3x-4)(2x-3)
=(5x^3+3x^2-7x-5x^2-3x+7)
-(4x^3+3x^2-8x-6x^2-9x+12)
=(5x^3-2x^2-10x+7)-(4x^3-3x^2-17x+12)
=x^3-5x^2-27x+19
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