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(10!+9!)(8!+7!)(6!+5!)(4!+3!)(2!+1!)(10!−9!)(8!−7!)(6!−5!)(4!−3!)(2!−1!)= ?\large \dfrac{(10!\color{#20A900}{+}9!)(8!\color{#20A900}{+}7!)(6!\color{#20A900}{+}5!)(4!\color{#20A900}{+}3!)(2!\color{#20A900}{+}1!)}{(10!\color{#D61F06}{-}9!)(8!\color{#D61F06}{-}7!)(6!\color{#D61F06}{-}5!)(4!\color{#D61F06}{-}3!)(2!\color{#D61F06}{-}1!)} = \, \, \large ?(10!−9!)(8!−7!)(6!−5!)(4!−3!)(2!−1!)(10!+9!)(8!+7!)(6!+5!)(4!+3!)(2!+1!)=?
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