问题标题:
32(x·y)^4÷[-8/9(y-x)^3]
问题描述:

32(x·y)^4÷[-8/9(y-x)^3]

谭亚明回答:
  32(x-y)^4÷[-8/9(y-x)^3]   =32(x-y)^4÷[8/9(x-y)^3]   =32*9/8*(x-y)^4÷(x-y)^3   =36(x-y)   =36x-36y
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