Question 255574
It pasted well enough :)

{{{(-27y^36/1000)^(1/3)}}}
For now, just treat each factor separately
{{{(-27)^(1/3) * (y^36)^(1/3) * (1/1000)^(1/3)}}}
{{{-3 * y^12 * (1/10)}}}
{{{-3y^12/10}}}