Rewrite using the commutative property of multiplication.

Apply the product rule to .

Apply the product rule to .

Raise to the power of .

Apply the power rule and multiply exponents, .

Multiply by .

Move .

Use the power rule to combine exponents.

Add and .

Apply the power rule and multiply exponents, .

Multiply by .

Move .

Multiply by .

Raise to the power of .

Use the power rule to combine exponents.

Add and .

Multiply by .

Multiply (5a^3b^4)^3(7a^8b)