4m+5n+7, -5m-n-3 and 3m-3n+2
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Answer: 3m-4n+3mn-3
Step by step explaination:
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.
This is the answer.
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