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Question

Add and subtract
(i)mn,m+n
(ii)mn+52,mn+3

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Solution

Part(i)
Add
=mn+m+n=2m
Subtract
=mnmn=2n

Part(ii)
Add
=mn+52+mn+3=2mn+6
Subtract
=mn+52mn3=0

Hence, this is the answer.

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