thank you for the help
(5ab)^(2/3) =
(5^2 * a^2 * b^2) ^(1/3) =
3√ [ 25 a^2 b^2 ]
3√ [ 27 x^6 y^3 ] =
( 3^3 * x^6 * y^3)^(1/3) = [use the fact that (a^m)^n = a^(m*n)
(3 * x^2 * y)
