Help me, please.

( a^2/5 b² )⁵    =

(a^2/5)⁵  * (b²)⁵  =

Using  (a^m)ⁿ   =   a^m*n      we have

a^10/5  *  b¹⁰   =     a²b¹⁰

[ Note, Manuel.....we don't have any fractional exponents as a result... ]