K788 :

 a^2*b^6*c^4*x^2*y - b^4*c^8*x^2*y - a^6*b^2*c^4*x*y^2 + a^4*c^8*x*y^2 + b^8*c^4*x^2*z - a^2*b^4*c^6*x^2*z - a^8*c^4*y^2*z + a^4*b^2*c^6*y^2*z - a^4*b^8*x*z^2 + 
     a^6*b^4*c^2*x*z^2 + a^8*b^4*y*z^2 - a^4*b^6*c^2*y*z^2 = 0