K485 :
2*a^4*x^2*y - 4*a^2*b^2*x^2*y + 2*b^4*x^2*y - a^2*c^2*x^2*y -  b^2*c^2*x^2*y - 4*c^4*x^2*y - 2*a^4*x*y^2 + 4*a^2*b^2*x*y^2 -  2*b^4*x*y^2 + a^2*c^2*x*y^2 + b^2*c^2*x*y^2 + 4*c^4*x*y^2 - 2*a^4*x^2*z +   a^2*b^2*x^2*z + 4*b^4*x^2*z + 4*a^2*c^2*x^2*z + b^2*c^2*x^2*z -  2*c^4*x^2*z - 4*a^4*y^2*z - a^2*b^2*y^2*z + 2*b^4*y^2*z - a^2*c^2*y^2*z -  4*b^2*c^2*y^2*z + 2*c^4*y^2*z + 2*a^4*x*z^2 - a^2*b^2*x*z^2 -   4*b^4*x*z^2 - 4*a^2*c^2*x*z^2 - b^2*c^2*x*z^2 + 2*c^4*x*z^2 +   4*a^4*y*z^2 + a^2*b^2*y*z^2 - 2*b^4*y*z^2 + a^2*c^2*y*z^2 +  4*b^2*c^2*y*z^2 - 2*c^4*y*z^2 = 0