计算:(x-y)/(x²-2xy+y²)
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计算:x²+2xy+y²/xy-y².x²-2xy+y²/xy+y
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分式计算:(x²+2xy+y²)/(x²y+xy)*y/(x+y)
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(x^2+xy/x-y)/(xy/x-y)计算
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计算(x²+2xy+y²)(x²-xy+y²)²
计算 2xy[4x²y²-3y(xy+x²y)-xy²]