Add or subtract.(-4mn + 4mn2 - 2m2n2) + 

A. -9mn + 9m2n + 10m2n2
B. 10m2n2
C. 10m2n2 + 5m2n + 4mn2 - 9mn
D. 1mn + 4mn2 + 5m2n + 10m2n2


Answer: C

Mathematics

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A.  + 
B.  + 
C.  + 
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