One more exponents question ;)

One more I forgot to put on the last question:
simplify please, to where there's no negative exponents if you could!

(5x^-3)^3

(5x^-3)^3
=5^3 * x^-9
=125/(x^9)

Hey secret sorrow,
i guess the question should be properly grouped as-
(5x)^(-3^3)...thats (5x)^(-9)
and bro ya need not worry about negative sing, it just means 1/(5x)^9..:-)