Add 4m +5n+7,-5m-n-3 and 3m-3n+2
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Answer:=3m−4n+3mn−3.
Step-by-step explanation:
5m−7n,3n−4m+2,2m−3mn−5=5m−7n+3n−4m+2+2m−3mn−5
=5m−4m+2m−7n+3n−3mn+2−5
=(5−4+2)m+(−7+3)n−3mn−3
=3m−4n+3mn−3.
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