To write a3 as a fraction with a common denominator, multiply by a-4a-4.
Combine the numerators over the common denominator.
Rewrite a3(a-4)-64a-4 in a factored form.
Apply the distributive property.
Multiply a3 by a by adding the exponents.
Multiply a3 by a.
Raise a to the power of 1.
Use the power rule aman=am+n to combine exponents.
Add 3 and 1.
Move -4 to the left of a3.