\frac{3!\cdot (x-1)!}{4\cdot (x-3)!}=\frac{182\cdot (x-2)!-x}{2\cdot (x-2)!}\frac{3!\cdot (x-1)!}{4\cdot (x-3)!}=\frac{182\cdot (x-2)!-x}{2\cdot (x-2)!}

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