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What is the simplest form of this expression y^2(-y+4)-7y^3

What is the simplest form of this expression y^2(-y+4)-7y^3-example-1
User VvMINOvv
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= -y^3 + 4y^2 - 7y^3
= -8y^3 + 4y^2

answer
-8y^3 + 4y^2
User Jake Marsh
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