计算:(1)|(x+y)2-(x-y)2|÷3xy(2)(a3b2+2a4b3-3a3b4)÷(-12a3b2)(3)(3x-y)(3x+y)+y(
计算:(1)|(x+y)2-(x-y)2|÷3xy(2)(a3b2+2a4b3-3a3b4)÷(-12a3b2)(3)(3x-y)(3x+y)+y(x+y),其中x=-1...
计算:(1)|(x+y)2-(x-y)2|÷3xy(2)(a3b2+2a4b3-3a3b4)÷(-12a3b2)(3)(3x-y)(3x+y)+y(x+y),其中x=-1,y=1.
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