Q189 :

a^8 x^4 y^2-6 a^4 b^4 x^4 y^2+8 a^2 b^6 x^4 y^2-3 b^8 x^4 y^2+8 a^4 b^2 c^2 x^4 y^2-16 a^2 b^4 c^2 x^4 y^2+8 b^6 c^2 x^4 y^2-2 a^4 c^4 x^4 y^2+8 a^2 b^2 c^4 x^4 y^2-6 b^4 c^4 x^4 y^2+c^8 x^4 y^2-2 a^8 x^3 y^3+8 a^6 b^2 x^3 y^3-12 a^4 b^4 x^3 y^3+8 a^2 b^6 x^3 y^3-2 b^8 x^3 y^3+4 a^4 c^4 x^3 y^3-8 a^2 b^2 c^4 x^3 y^3+4 b^4 c^4 x^3 y^3-2 c^8 x^3 y^3-3 a^8 x^2 y^4+8 a^6 b^2 x^2 y^4-6 a^4 b^4 x^2 y^4+b^8 x^2 y^4+8 a^6 c^2 x^2 y^4-16 a^4 b^2 c^2 x^2 y^4+8 a^2 b^4 c^2 x^2 y^4-6 a^4 c^4 x^2 y^4+8 a^2 b^2 c^4 x^2 y^4-2 b^4 c^4 x^2 y^4+c^8 x^2 y^4-2 a^8 x^4 y z+4 a^4 b^4 x^4 y z-2 b^8 x^4 y z-8 a^4 b^2 c^2 x^4 y z+8 b^6 c^2 x^4 y z+4 a^4 c^4 x^4 y z-12 b^4 c^4 x^4 y z+8 b^2 c^6 x^4 y z-2 c^8 x^4 y z+2 a^8 x^3 y^2 z-16 a^6 b^2 x^3 y^2 z+44 a^4 b^4 x^3 y^2 z-48 a^2 b^6 x^3 y^2 z+18 b^8 x^3 y^2 z+8 a^6 c^2 x^3 y^2 z-16 a^4 b^2 c^2 x^3 y^2 z+56 a^2 b^4 c^2 x^3 y^2 z-48 b^6 c^2 x^3 y^2 z-20 a^4 c^4 x^3 y^2 z-16 a^2 b^2 c^4 x^3 y^2 z+44 b^4 c^4 x^3 y^2 z+8 a^2 c^6 x^3 y^2 z-16 b^2 c^6 x^3 y^2 z+2 c^8 x^3 y^2 z+18 a^8 x^2 y^3 z-48 a^6 b^2 x^2 y^3 z+44 a^4 b^4 x^2 y^3 z-16 a^2 b^6 x^2 y^3 z+2 b^8 x^2 y^3 z-48 a^6 c^2 x^2 y^3 z+56 a^4 b^2 c^2 x^2 y^3 z-16 a^2 b^4 c^2 x^2 y^3 z+8 b^6 c^2 x^2 y^3 z+44 a^4 c^4 x^2 y^3 z-16 a^2 b^2 c^4 x^2 y^3 z-20 b^4 c^4 x^2 y^3 z-16 a^2 c^6 x^2 y^3 z+8 b^2 c^6 x^2 y^3 z+2 c^8 x^2 y^3 z-2 a^8 x y^4 z+4 a^4 b^4 x y^4 z-2 b^8 x y^4 z+8 a^6 c^2 x y^4 z-8 a^2 b^4 c^2 x y^4 z-12 a^4 c^4 x y^4 z+4 b^4 c^4 x y^4 z+8 a^2 c^6 x y^4 z-2 c^8 x y^4 z+a^8 x^4 z^2-2 a^4 b^4 x^4 z^2+b^8 x^4 z^2+8 a^4 b^2 c^2 x^4 z^2+8 a^2 b^4 c^2 x^4 z^2-6 a^4 c^4 x^4 z^2-16 a^2 b^2 c^4 x^4 z^2-6 b^4 c^4 x^4 z^2+8 a^2 c^6 x^4 z^2+8 b^2 c^6 x^4 z^2-3 c^8 x^4 z^2+2 a^8 x^3 y z^2+8 a^6 b^2 x^3 y z^2-20 a^4 b^4 x^3 y z^2+8 a^2 b^6 x^3 y z^2+2 b^8 x^3 y z^2-16 a^6 c^2 x^3 y z^2-16 a^4 b^2 c^2 x^3 y z^2-16 a^2 b^4 c^2 x^3 y z^2-16 b^6 c^2 x^3 y z^2+44 a^4 c^4 x^3 y z^2+56 a^2 b^2 c^4 x^3 y z^2+44 b^4 c^4 x^3 y z^2-48 a^2 c^6 x^3 y z^2-48 b^2 c^6 x^3 y z^2+18 c^8 x^3 y z^2-30 a^8 x^2 y^2 z^2+80 a^6 b^2 x^2 y^2 z^2-100 a^4 b^4 x^2 y^2 z^2+80 a^2 b^6 x^2 y^2 z^2-30 b^8 x^2 y^2 z^2+80 a^6 c^2 x^2 y^2 z^2-32 a^4 b^2 c^2 x^2 y^2 z^2-32 a^2 b^4 c^2 x^2 y^2 z^2+80 b^6 c^2 x^2 y^2 z^2-100 a^4 c^4 x^2 y^2 z^2-32 a^2 b^2 c^4 x^2 y^2 z^2-100 b^4 c^4 x^2 y^2 z^2+80 a^2 c^6 x^2 y^2 z^2+80 b^2 c^6 x^2 y^2 z^2-30 c^8 x^2 y^2 z^2+2 a^8 x y^3 z^2+8 a^6 b^2 x y^3 z^2-20 a^4 b^4 x y^3 z^2+8 a^2 b^6 x y^3 z^2+2 b^8 x y^3 z^2-16 a^6 c^2 x y^3 z^2-16 a^4 b^2 c^2 x y^3 z^2-16 a^2 b^4 c^2 x y^3 z^2-16 b^6 c^2 x y^3 z^2+44 a^4 c^4 x y^3 z^2+56 a^2 b^2 c^4 x y^3 z^2+44 b^4 c^4 x y^3 z^2-48 a^2 c^6 x y^3 z^2-48 b^2 c^6 x y^3 z^2+18 c^8 x y^3 z^2+a^8 y^4 z^2-2 a^4 b^4 y^4 z^2+b^8 y^4 z^2+8 a^4 b^2 c^2 y^4 z^2+8 a^2 b^4 c^2 y^4 z^2-6 a^4 c^4 y^4 z^2-16 a^2 b^2 c^4 y^4 z^2-6 b^4 c^4 y^4 z^2+8 a^2 c^6 y^4 z^2+8 b^2 c^6 y^4 z^2-3 c^8 y^4 z^2-2 a^8 x^3 z^3+4 a^4 b^4 x^3 z^3-2 b^8 x^3 z^3+8 a^6 c^2 x^3 z^3-8 a^2 b^4 c^2 x^3 z^3-12 a^4 c^4 x^3 z^3+4 b^4 c^4 x^3 z^3+8 a^2 c^6 x^3 z^3-2 c^8 x^3 z^3+18 a^8 x^2 y z^3-48 a^6 b^2 x^2 y z^3+44 a^4 b^4 x^2 y z^3-16 a^2 b^6 x^2 y z^3+2 b^8 x^2 y z^3-48 a^6 c^2 x^2 y z^3+56 a^4 b^2 c^2 x^2 y z^3-16 a^2 b^4 c^2 x^2 y z^3+8 b^6 c^2 x^2 y z^3+44 a^4 c^4 x^2 y z^3-16 a^2 b^2 c^4 x^2 y z^3-20 b^4 c^4 x^2 y z^3-16 a^2 c^6 x^2 y z^3+8 b^2 c^6 x^2 y z^3+2 c^8 x^2 y z^3+2 a^8 x y^2 z^3-16 a^6 b^2 x y^2 z^3+44 a^4 b^4 x y^2 z^3-48 a^2 b^6 x y^2 z^3+18 b^8 x y^2 z^3+8 a^6 c^2 x y^2 z^3-16 a^4 b^2 c^2 x y^2 z^3+56 a^2 b^4 c^2 x y^2 z^3-48 b^6 c^2 x y^2 z^3-20 a^4 c^4 x y^2 z^3-16 a^2 b^2 c^4 x y^2 z^3+44 b^4 c^4 x y^2 z^3+8 a^2 c^6 x y^2 z^3-16 b^2 c^6 x y^2 z^3+2 c^8 x y^2 z^3-2 a^8 y^3 z^3+4 a^4 b^4 y^3 z^3-2 b^8 y^3 z^3-8 a^4 b^2 c^2 y^3 z^3+8 b^6 c^2 y^3 z^3+4 a^4 c^4 y^3 z^3-12 b^4 c^4 y^3 z^3+8 b^2 c^6 y^3 z^3-2 c^8 y^3 z^3-3 a^8 x^2 z^4+8 a^6 b^2 x^2 z^4-6 a^4 b^4 x^2 z^4+b^8 x^2 z^4+8 a^6 c^2 x^2 z^4-16 a^4 b^2 c^2 x^2 z^4+8 a^2 b^4 c^2 x^2 z^4-6 a^4 c^4 x^2 z^4+8 a^2 b^2 c^4 x^2 z^4-2 b^4 c^4 x^2 z^4+c^8 x^2 z^4-2 a^8 x y z^4+8 a^6 b^2 x y z^4-12 a^4 b^4 x y z^4+8 a^2 b^6 x y z^4-2 b^8 x y z^4+4 a^4 c^4 x y z^4-8 a^2 b^2 c^4 x y z^4+4 b^4 c^4 x y z^4-2 c^8 x y z^4+a^8 y^2 z^4-6 a^4 b^4 y^2 z^4+8 a^2 b^6 y^2 z^4-3 b^8 y^2 z^4+8 a^4 b^2 c^2 y^2 z^4-16 a^2 b^4 c^2 y^2 z^4+8 b^6 c^2 y^2 z^4-2 a^4 c^4 y^2 z^4+8 a^2 b^2 c^4 y^2 z^4-6 b^4 c^4 y^2 z^4+c^8 y^2 z^4=0