Answer
15$y^{5}$-40$y^{3}$
Work Step by Step
Given: -5$y^{2}$(-3$y^{3}$+8y)
Distributive property: -5$y^{2}$(-3$y^{3}$)+(-5$y^{2}$)(8y)
Simplify: 15$y^{2+3}$-40$y^{2+1}$
Simplify: 15$y^{5}$-40$y^{3}$
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