(x-y-z)(x-y-z)(x-y-z)等于多少?
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(x-y-z)(x-y-z)(x-y-z)等于多少?(x-y-z)(x-y-z)(x-y-z)等于多少?(x-y-z)(x-y-z)(x-y-z)等于多少?x^2+y^2+z^2-2xy+2yz-2z
(x-y-z)(x-y-z)(x-y-z)等于多少?
(x-y-z)(x-y-z)(x-y-z)等于多少?
(x-y-z)(x-y-z)(x-y-z)等于多少?
x^2+y^2+z^2-2xy+2yz-2zx
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(x-y+z)²
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方向 X Y Z