Answer
13y$^3$-8y$^2$+7y-5
Work Step by Step
Combine like terms to simplify.
(9y$^3$-7y$^2$+5)+(4y$^3$-y$^2$+7y-10)
(9y$^3$+4y$^3$)+(-7y$^2$-y$^2$)+(7y)+(5-10)
13y$^3$-8y$^2$+7y-5
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