Question 80031
Do you mean:
1) {{{5x^(-4)}}} or 2) {{{(5x)^(-4)}}}
If you mean 1) then:
{{{5x^(-4) = 5/x^4}}}

If you mean 2) then:
{{{(5x)^(-4) = 1/(5x)^4}}} = {{{1/625x^4}}}

YYUR, YYUB, ICURYY4ME