Find the domain of the function $\frac{x^4-4x^3+6x^2-4x+1}{x^2-4}$.
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Find the domain of the function $\frac{x^4-4x^3+6x^2-4x+1}{x^2-4}$.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
(-\infty,-2)\cup(-2, 2)\cup(2,\infty)
Find the domain of the function $\frac{x^4-4x^3+6x^2-4x+1}{x^2-4}$.
train