K632 :
-a^2*b*c^3*x^2*y + 2*a*b^2*c^3*x^2*y - b^3*c^3*x^2*y + b*c^5*x^2*y + a^3*c^3*x*y^2 - 2*a^2*b*c^3*x*y^2 + a*b^2*c^3*x*y^2 - a*c^5*x*y^2 + a^2*b^3*c*x^2*z - b^5*c*x^2*z -  2*a*b^3*c^2*x^2*z + b^3*c^3*x^2*z + a^5*c*y^2*z - a^3*b^2*c*y^2*z + 2*a^3*b*c^2*y^2*z - a^3*c^3*y^2*z - a^3*b^3*x*z^2 + a*b^5*x*z^2 + 2*a^2*b^3*c*x*z^2 - a*b^3*c^2*x*z^2 - a^5*b*y*z^2 +  a^3*b^3*y*z^2 - 2*a^3*b^2*c*y*z^2 + a^3*b*c^2*y*z^2 = 0