已知x(x-1)-(x^2-y)=-3,求2xy-x^2+3-y^2的值
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已知x(x-1)-(x^2-y)=-3,求2xy-x^2+3-y^2的值已知x(x-1)-(x^2-y)=-3,求2xy-x^2+3-y^2的值已知x(x-1)-(x^2-y)=-3,求2xy-x^2
已知x(x-1)-(x^2-y)=-3,求2xy-x^2+3-y^2的值
已知x(x-1)-(x^2-y)=-3,求2xy-x^2+3-y^2的值
已知x(x-1)-(x^2-y)=-3,求2xy-x^2+3-y^2的值