7. Arrange the following expressions horizontally and add :
3a2 - 7a2b + 2ab2 – 5b2 and 8a2 - 3a2 + b2
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Answer:
3a2
-7a2b
+2ab2
_5b2
8a2
_3a2
+b2
_____
_____=6a6 b3
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