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5m-7n,3n-4m+2,2m-3mn-5
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Answer:
3m-4n-3-3mn
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+2-5-3mn
3m-4n-3-3mn
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