Question 603395
<pre>
{{{ matrix(2,1,"",216^(-5/3))}}}

Use the rule for negative exponents which is {{{A^(-N)}}} = {{{1/(A^N)}}}

{{{1/( matrix(2,1,"",216^(5/3)))}}}

Use the rule for fractional exponents {{{ matrix(2,1,"",A^(M/N))}}} = {{{(root(N,A))^M}}}

{{{1/(root(3,216))^5}}}

Get the cube root of 216 which is 6

{{{1/(6^5)}}}

{{{1/7776}}}

Edwin</pre>