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Rathma · Answer 1 · 2018-06-12T17:33:57+0000

-3xy 3 + 7xy 3 + (-xy 3) + (-3xy 3).

First combine like terms:
-3xy 3 + (-3xy 3) + 7xy 3 + (-xy 3)

-3xy3 + -3xy3 = -6xy3
7xy3 + -xy3 = 6xy3

The answer is 7xy3 + 6xy3

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