K532 :

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