Apply the distributive property.

Rewrite using the commutative property of multiplication.

Rewrite using the commutative property of multiplication.

Multiply by .

Multiply by by adding the exponents.

Use the power rule to combine exponents.

Add and .

Multiply by .

Multiply by by adding the exponents.

Use the power rule to combine exponents.

Add and .

Multiply by .

Simplify (9y^5-4y^2+5)*(10y^4)