27 • a • a • a as an expression?

For this case we have the following expression:
[tex]27 * a * a * a[/tex]
By definition, by ownership of the power:
In the multiplication, if we have the same base the exponents are added, for example:
[tex]A (x * x * x) = Ax^{(1 + 1 + 1)}= Ax ^ 3[/tex]
Rewriting the given expression we have:
[tex](3 * 3 * 3) (a * a * a) =[/tex]
[tex](3^ {(1 + 1 + 1)})*(a^ {(1 + 1 + 1)}) =[/tex]
[tex]3 ^ 3 * a ^ 3 =[/tex]
[tex](3a) ^ 3[/tex]
Answer:
Rewriting the given expression we have:
[tex](3a) ^ 3[/tex]