计算:(1)(-6a2b5c)÷(-2ab2)2(2)(-3m-2n)(3m+2n)(3)[(x-2y)2-(x-2y)(x+2y)]÷2y
计算:(1)(-6a2b5c)÷(-2ab2)2(2)(-3m-2n)(3m+2n)(3)[(x-2y)2-(x-2y)(x+2y)]÷2y....
计算:(1)(-6a2b5c)÷(-2ab2)2(2)(-3m-2n)(3m+2n)(3)[(x-2y)2-(x-2y)(x+2y)]÷2y.
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