Use the Binomial Theorem.

Rewrite using the commutative property of multiplication.

Multiply by .

Apply the product rule to .

Rewrite using the commutative property of multiplication.

Raise to the power of .

Multiply by .

Apply the product rule to .

Raise to the power of .

Apply the distributive property.

Multiply by .

Multiply by .

Multiply by .

Remove parentheses.

Simplify 8(a-3b)^3-1