-m+3n-5的相反数与m+3n的差

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-m+3n-5的相反数与m+3n的差-m+3n-5的相反数与m+3n的差-m+3n-5的相反数与m+3n的差-m+3n-5的相反数时m-3n+5(m-3n+5)-(m+3n)=m-3n+5-m-3n=

-m+3n-5的相反数与m+3n的差
-m+3n-5的相反数与m+3n的差

-m+3n-5的相反数与m+3n的差
-m+3n-5的相反数时m-3n+5
(m-3n+5)-(m+3n)
=m-3n+5-m-3n
=-6n+5

=-6n+5