Add : 7mn + 5 + 5m² , and 12mn + 8m² –12 and subtract it from
15m² – 9mn – 16
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your answer:
(−7mn+5)+(12mn+2)+(9mn−8)+(−2mn−3)
=−7mn+5+12mn+2+9mn−8−2mn−3
=12mn−4
I hope it helped you
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