When you multiply powers, they add, and when you divide them they subtract. So I would first add the 2^a + 2^b +2^c to get 2^(a+b+c) Then, divide by 2^(a+b). Because when you divide powers they subtract, you will be taking away the (a+b) from the (a+b+c) and you will be left with c on its own. The answer is 2^c
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