(7x-9)(2x-5)-(3x-8)(3x+8)
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(7x-9)(2x-5)-(3x-8)(3x+8)
7x(2x-5)-9(2x-5)-3x^2-8^2
14x^2-35x-18x+45-9x^2-64
5x^2-53x-19
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