3m + 23m2 6n2+2m+n2+___=5m+ 7n
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Answer:
(5m−7n)+(3n−4m+2)+(2m−3mn−5)
=5m−7n+3n−4m+2+2m−3mn−5
=3m−4n−3mn−3
Hence the correct answer is 3m−4n−3mn−3.
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