Multiply the exponents in (a4)13.
Apply the power rule and multiply exponents, (am)n=amn.
Combine 4 and 13.
Move a1 to the numerator using the negative exponent rule 1bn=b-n.
Multiply a43 by a-1 by adding the exponents.
Use the power rule aman=am+n to combine exponents.
To write -1 as a fraction with a common denominator, multiply by 33.
Combine -1 and 33.
Combine the numerators over the common denominator.
Simplify the numerator.
Multiply -1 by 3.
Subtract 3 from 4.