Problem Solving

How should I approuch this problem


2^(4-1)^2
------------
2^(3-2)


I think that the answer is 2^5, but I am incorrect is power to 8... And I can't understand why.

Let's see


2^(4-1)^2 =
----------
2^(3-2) =



2^3^2
---------
2^1



2^6
--------
2


Equals 2^5

Why this is incorrect, what concept am I missing out here?

2^3^2 = (2)^3^2 = 2^9
2^3^2 NOT equal to (2^3)^2