Subtract: 31(1-4m+5n) from 41(10n-3m+21)

Dear student,
Subtract: 31(1-4m+5n) from 41(10n-3m+21) i.e. 41(10n-3m+21) -31(1-4m+5n)=410n-123m+861-31+124m-155n=410n-155n-123m+124m+861-31=-255n+m+830
Regards

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