Expand the product $(x-2)^2(x+2)^2$. What is the product of the nonzero coefficients of the resulting expression, including the constant term?
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<|im_start|>user
Expand the product $(x-2)^2(x+2)^2$. What is the product of the nonzero coefficients of the resulting expression, including the constant term?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

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-128
Expand the product $(x-2)^2(x+2)^2$. What is the product of the nonzero coefficients of the resulting expression, including the constant term?
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