(m-n)^8÷(n-m)^3
=(m-n)^8÷[-(m-n)^3]
=-(m-n)^5
=(n-m)^5
或者这样:
因为(m-n)^8=(n-m)^8
所以:
(m-n)^8÷(n-m)^3
=(n-m)^8÷(n-m)^3
=(n-m)^5
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