What is the positive value of the expression $\sqrt{x^3 - 2^y}$ when $x = 5$ and $y = 2$?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
What is the positive value of the expression $\sqrt{x^3 - 2^y}$ when $x = 5$ and $y = 2$?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
11
What is the positive value of the expression $\sqrt{x^3 - 2^y}$ when $x = 5$ and $y = 2$?
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