Which expression is equivalent to 18x^2 y^5/(3xy)^2 for all values for X and Y where the expression is defined

The expression 18x^2 y^5/(3xy)^2 is equivalent to:

(18x^2 y^5)/(9x^2 y^2)

Simplifying further:

= 2y^(5-2)

= 2y^3