K772 :a^2*b^2*c^5*x^2*y - b^3*c^6*x^2*y - a^2*b^2*c^5*x*y^2 + a^3*c^6*x*y^2 - a^2*b^5*c^2*x^2*z + b^6*c^3*x^2*z + a^5*b^2*c^2*y^2*z - a^6*c^3*y^2*z - a^3*b^6*x*z^2 +  a^2*b^5*c^2*x*z^2 + a^6*b^3*y*z^2 - a^5*b^2*c^2*y*z^2 = 0