[(x+2xy)^2-(x+y)(3x-y)-5y^2]÷2x,其中x=-2,y=1/2
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[(x+2xy)^2-(x+y)(3x-y)-5y^2]÷2x,其中x=-2,y=1/2[(x+2xy)^2-(x+y)(3x-y)-5y^2]÷2x,其中x=-2,y=1/2[(x+2xy)^2-(
[(x+2xy)^2-(x+y)(3x-y)-5y^2]÷2x,其中x=-2,y=1/2
[(x+2xy)^2-(x+y)(3x-y)-5y^2]÷2x,其中x=-2,y=1/2
[(x+2xy)^2-(x+y)(3x-y)-5y^2]÷2x,其中x=-2,y=1/2
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