(x-2y)^2(x^2-4y^2)^2(x+2y)^2=(x-2y)^2[(x+2y)(x-2y)]^2(x+2y)^2=(x-2y)^4(x+2y)^4
求(x-2y)^2(x^2-4y^2)^2(x+2y)^2的简便方法及答案
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