Question 663177
<pre>
Either of two ways.  Take your pick

{{{matrix(2,1,"", 1000^(1/3))}}} = {{{matrix(2,1,"", (10^3)^(1/3))}}} = {{{matrix(2,1,"", 10^(3*expr(1/3)))}}} = {{{matrix(2,1,"", 10^(cross(3)*expr(1/cross(3))))}}} = {{{matrix(2,1,"", 10^1)}}} = 10

Or use formula


{{{matrix(2,1,"", A^(B/C))}}} = {{{root(C,A^B)}}} = {{{(root(C,A))^B}}}


{{{matrix(2,1,"", 1000^(1/3))}}} = {{{root(3,1000^1)}}} = {{{(root(3,1000))^1}}} = {{{10^1}}} = 10

Edwin</pre>