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OpenStudy (anonymous):
(-2xy^3-9x^4y^3)+(3xy^3+7y3+7y^4)+(3x^4y^3+2xy^3)
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OpenStudy (anonymous):
since this is addition, you can forget those parentheses... if one of them was a minus sign, you would have to distribute the -1 across that term, but we don't have to mess with that here. so how many xy^3 are there in that thing?
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