When $(x\sqrt{x^3})^4$ is simplified, what is the exponent of $x$?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
When $(x\sqrt{x^3})^4$ is simplified, what is the exponent of $x$?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
10
When $(x\sqrt{x^3})^4$ is simplified, what is the exponent of $x$?
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