12
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
The function $f(x)$ is defined by $f(x)=x^{2}-x$. What is the value of $f(4)$?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
12
The function $f(x)$ is defined by $f(x)=x^{2}-x$. What is the value of $f(4)$?
train