Рациональный знаменатель
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2 2 2 2 2 2 2 2 2 2 2 2
-1 + x + y + z + x*y + x*z + y*z - x*y - x*z - y*x - y*z - z*x - z*y + x*y*z + x*z*y + y*z*x - 2*x*y*z
$$x^{2} y z + x y^{2} z + x y z^{2} - x^{2} y - x^{2} z - x y^{2} - 2 x y z - x z^{2} - y^{2} z - y z^{2} + x^{2} + x y + x z + y^{2} + y z + z^{2} - 1$$
-1 + x^2 + y^2 + z^2 + x*y + x*z + y*z - x*y^2 - x*z^2 - y*x^2 - y*z^2 - z*x^2 - z*y^2 + x*y*z^2 + x*z*y^2 + y*z*x^2 - 2*x*y*z
2 2 2 2 2 2 2 2 2 2 2 2
-1 + x + y + z + x*y + x*z + y*z - x*y - x*z - y*x - y*z - z*x - z*y + x*y*z + x*z*y + y*z*x - 2*x*y*z
$$x^{2} y z + x y^{2} z + x y z^{2} - x^{2} y - x^{2} z - x y^{2} - 2 x y z - x z^{2} - y^{2} z - y z^{2} + x^{2} + x y + x z + y^{2} + y z + z^{2} - 1$$
-1 + x^2 + y^2 + z^2 + x*y + x*z + y*z - x*y^2 - x*z^2 - y*x^2 - y*z^2 - z*x^2 - z*y^2 + x*y*z^2 + x*z*y^2 + y*z*x^2 - 2*x*y*z