K428 :

-a^8*b^4*c^4*x^2*y + 2*a^6*b^6*c^4*x^2*y - 2*a^2*b^10*c^4*x^2*y + b^12*c^4*x^2*y - a^6*b^4*c^6*x^2*y + 2*a^4*b^6*c^6*x^2*y + a^2*b^8*c^6*x^2*y - 2*b^10*c^6*x^2*y + a^4*b^4*c^8*x^2*y + 2*a^2*b^6*c^8*x^2*y - a^2*b^4*c^10*x^2*y + 2*b^6*c^10*x^2*y - b^4*c^12*x^2*y - a^12*c^4*x*y^2 + 2*a^10*b^2*c^4*x*y^2 - 2*a^6*b^6*c^4*x*y^2 + a^4*b^8*c^4*x*y^2 + 2*a^10*c^6*x*y^2 - a^8*b^2*c^6*x*y^2 - 2*a^6*b^4*c^6*x*y^2 + a^4*b^6*c^6*x*y^2 - 2*a^6*b^2*c^8*x*y^2 - a^4*b^4*c^8*x*y^2 - 2*a^6*c^10*x*y^2 + a^4*b^2*c^10*x*y^2 + a^4*c^12*x*y^2 + a^8*b^4*c^4*x^2*z + a^6*b^6*c^4*x^2*z - a^4*b^8*c^4*x^2*z + a^2*b^10*c^4*x^2*z + b^12*c^4*x^2*z - 2*a^6*b^4*c^6*x^2*z - 2*a^4*b^6*c^6*x^2*z - 2*a^2*b^8*c^6*x^2*z - 2*b^10*c^6*x^2*z - a^2*b^6*c^8*x^2*z + 2*a^2*b^4*c^10*x^2*z + 2*b^6*c^10*x^2*z - b^4*c^12*x^2*z - a^12*c^4*y^2*z - a^10*b^2*c^4*y^2*z + a^8*b^4*c^4*y^2*z - a^6*b^6*c^4*y^2*z - a^4*b^8*c^4*y^2*z + 2*a^10*c^6*y^2*z + 2*a^8*b^2*c^6*y^2*z + 2*a^6*b^4*c^6*y^2*z + 2*a^4*b^6*c^6*y^2*z + a^6*b^2*c^8*y^2*z - 2*a^6*c^10*y^2*z - 2*a^4*b^2*c^10*y^2*z + a^4*c^12*y^2*z + a^12*b^4*x*z^2 - 2*a^10*b^6*x*z^2 + 2*a^6*b^10*x*z^2 - a^4*b^12*x*z^2 - 2*a^10*b^4*c^2*x*z^2 + a^8*b^6*c^2*x*z^2 + 2*a^6*b^8*c^2*x*z^2 - a^4*b^10*c^2*x*z^2 + 2*a^6*b^6*c^4*x*z^2 + a^4*b^8*c^4*x*z^2 + 2*a^6*b^4*c^6*x*z^2 - a^4*b^6*c^6*x*z^2 - a^4*b^4*c^8*x*z^2 + a^12*b^4*y*z^2 - 2*a^10*b^6*y*z^2 + 2*a^6*b^10*y*z^2 - a^4*b^12*y*z^2 + a^10*b^4*c^2*y*z^2 - 2*a^8*b^6*c^2*y*z^2 - a^6*b^8*c^2*y*z^2 + 2*a^4*b^10*c^2*y*z^2 - a^8*b^4*c^4*y*z^2 - 2*a^6*b^6*c^4*y*z^2 + a^6*b^4*c^6*y*z^2 - 2*a^4*b^6*c^6*y*z^2 + a^4*b^4*c^8*y*z^2 = 0