Question 662546
Starting with 
{{{((3xy^-2)/x^3)^2}}}

{{{((3x/y^2)/x^3)^2}}}

{{{((3x/y^2)*(1/x^3))^2}}}

{{{(3x/(x^3y^2))^2}}}

{{{(9x^2)/(x^6y^4)}}}

{{{(9)/(x^4y^4)}}}