Apply the distributive property.

Apply the distributive property.

Apply the distributive property.

Simplify each term.

Rewrite using the commutative property of multiplication.

Multiply by by adding the exponents.

Use the power rule to combine exponents.

Add and .

Multiply by .

Rewrite using the commutative property of multiplication.

Multiply by .

Rewrite using the commutative property of multiplication.

Multiply by .

Rewrite using the commutative property of multiplication.

Multiply by by adding the exponents.

Use the power rule to combine exponents.

Add and .

Multiply by .

Add and .

Move .

Add and .

Move .

Reorder and .

Simplify (12x^2+7y^3)(4x^2+7y^3)