Q105 :

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