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(5x-3)(x-2)-(15x-9)+(3-5x)(x+7)

(n-1)(x-1)+(n-1)(2x-5)-(x-1)(5n+3

(x-5)(n+7)+(x-5)-(5-x)(5x-4)

(x-3)(n+7)-(2n-6)-(6x-18)(2x+5)​


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