Q087 :

b^2*c^4*x^4*y - a^2*c^4*x^3*y^2 - 2*b^2*c^4*x^3*y^2 + 4*c^6*x^3*y^2 + 2*a^2*c^4*x^2*y^3 + b^2*c^4*x^2*y^3 - 4*c^6*x^2*y^3 - a^2*c^4*x*y^4 - b^4*c^2*x^4*z + 2*b^4*c^2*x^3*y*z - 2*b^2*c^4*x^3*y*z + a^4*c^2*x^2*y^2*z - b^4*c^2*x^2*y^2*z - 10*a^2*c^4*x^2*y^2*z + 10*b^2*c^4*x^2*y^2*z - 2*a^4*c^2*x*y^3*z + 2*a^2*c^4*x*y^3*z + a^4*c^2*y^4*z + a^2*b^4*x^3*z^2 - 4*b^6*x^3*z^2 + 2*b^4*c^2*x^3*z^2 - a^4*b^2*x^2*y*z^2 + 10*a^2*b^4*x^2*y*z^2 - 10*b^4*c^2*x^2*y*z^2 + b^2*c^4*x^2*y*z^2 - 10*a^4*b^2*x*y^2*z^2 + a^2*b^4*x*y^2*z^2 + 10*a^4*c^2*x*y^2*z^2 - a^2*c^4*x*y^2*z^2 + 4*a^6*y^3*z^2 - a^4*b^2*y^3*z^2 - 2*a^4*c^2*y^3*z^2 - 2*a^2*b^4*x^2*z^3 + 4*b^6*x^2*z^3 - b^4*c^2*x^2*z^3 + 2*a^4*b^2*x*y*z^3 - 2*a^2*b^4*x*y*z^3 - 4*a^6*y^2*z^3 + 2*a^4*b^2*y^2*z^3 + a^4*c^2*y^2*z^3 + a^2*b^4*x*z^4 - a^4*b^2*y*z^4 = 0