Q171 :

a^6 b^2 c^4 x^4 y^2+a^4 b^4 c^4 x^4 y^2-5 a^2 b^6 c^4 x^4 y^2+3 b^8 c^4 x^4 y^2-a^4 b^2 c^6 x^4 y^2+6 a^2 b^4 c^6 x^4 y^2-5 b^6 c^6 x^4 y^2-a^2 b^2 c^8 x^4 y^2+b^4 c^8 x^4 y^2+b^2 c^10 x^4 y^2-a^8 c^4 x^3 y^3+2 a^6 b^2 c^4 x^3 y^3-2 a^2 b^6 c^4 x^3 y^3+b^8 c^4 x^3 y^3+3 a^6 c^6 x^3 y^3-a^4 b^2 c^6 x^3 y^3+a^2 b^4 c^6 x^3 y^3-3 b^6 c^6 x^3 y^3-3 a^4 c^8 x^3 y^3+3 b^4 c^8 x^3 y^3+a^2 c^10 x^3 y^3-b^2 c^10 x^3 y^3-3 a^8 c^4 x^2 y^4+5 a^6 b^2 c^4 x^2 y^4-a^4 b^4 c^4 x^2 y^4-a^2 b^6 c^4 x^2 y^4+5 a^6 c^6 x^2 y^4-6 a^4 b^2 c^6 x^2 y^4+a^2 b^4 c^6 x^2 y^4-a^4 c^8 x^2 y^4+a^2 b^2 c^8 x^2 y^4-a^2 c^10 x^2 y^4-a^6 b^4 c^2 x^4 y z+3 a^4 b^6 c^2 x^4 y z-3 a^2 b^8 c^2 x^4 y z+b^10 c^2 x^4 y z+a^6 b^2 c^4 x^4 y z+a^2 b^6 c^4 x^4 y z-2 b^8 c^4 x^4 y z-3 a^4 b^2 c^6 x^4 y z-a^2 b^4 c^6 x^4 y z+3 a^2 b^2 c^8 x^4 y z+2 b^4 c^8 x^4 y z-b^2 c^10 x^4 y z+2 a^10 c^2 x^3 y^2 z-7 a^6 b^4 c^2 x^3 y^2 z+a^4 b^6 c^2 x^3 y^2 z+9 a^2 b^8 c^2 x^3 y^2 z-5 b^10 c^2 x^3 y^2 z-6 a^8 c^4 x^3 y^2 z+12 a^6 b^2 c^4 x^3 y^2 z+15 a^4 b^4 c^4 x^3 y^2 z-30 a^2 b^6 c^4 x^3 y^2 z+9 b^8 c^4 x^3 y^2 z+4 a^6 c^6 x^3 y^2 z-24 a^4 b^2 c^6 x^3 y^2 z+15 a^2 b^4 c^6 x^3 y^2 z+b^6 c^6 x^3 y^2 z+4 a^4 c^8 x^3 y^2 z+12 a^2 b^2 c^8 x^3 y^2 z-7 b^4 c^8 x^3 y^2 z-6 a^2 c^10 x^3 y^2 z+2 c^12 x^3 y^2 z+5 a^10 c^2 x^2 y^3 z-9 a^8 b^2 c^2 x^2 y^3 z-a^6 b^4 c^2 x^2 y^3 z+7 a^4 b^6 c^2 x^2 y^3 z-2 b^10 c^2 x^2 y^3 z-9 a^8 c^4 x^2 y^3 z+30 a^6 b^2 c^4 x^2 y^3 z-15 a^4 b^4 c^4 x^2 y^3 z-12 a^2 b^6 c^4 x^2 y^3 z+6 b^8 c^4 x^2 y^3 z-a^6 c^6 x^2 y^3 z-15 a^4 b^2 c^6 x^2 y^3 z+24 a^2 b^4 c^6 x^2 y^3 z-4 b^6 c^6 x^2 y^3 z+7 a^4 c^8 x^2 y^3 z-12 a^2 b^2 c^8 x^2 y^3 z-4 b^4 c^8 x^2 y^3 z+6 b^2 c^10 x^2 y^3 z-2 c^12 x^2 y^3 z-a^10 c^2 x y^4 z+3 a^8 b^2 c^2 x y^4 z-3 a^6 b^4 c^2 x y^4 z+a^4 b^6 c^2 x y^4 z+2 a^8 c^4 x y^4 z-a^6 b^2 c^4 x y^4 z-a^2 b^6 c^4 x y^4 z+a^4 b^2 c^6 x y^4 z+3 a^2 b^4 c^6 x y^4 z-2 a^4 c^8 x y^4 z-3 a^2 b^2 c^8 x y^4 z+a^2 c^10 x y^4 z-a^6 b^4 c^2 x^4 z^2+a^4 b^6 c^2 x^4 z^2+a^2 b^8 c^2 x^4 z^2-b^10 c^2 x^4 z^2-a^4 b^4 c^4 x^4 z^2-6 a^2 b^6 c^4 x^4 z^2-b^8 c^4 x^4 z^2+5 a^2 b^4 c^6 x^4 z^2+5 b^6 c^6 x^4 z^2-3 b^4 c^8 x^4 z^2-2 a^10 b^2 x^3 y z^2+6 a^8 b^4 x^3 y z^2-4 a^6 b^6 x^3 y z^2-4 a^4 b^8 x^3 y z^2+6 a^2 b^10 x^3 y z^2-2 b^12 x^3 y z^2-12 a^6 b^4 c^2 x^3 y z^2+24 a^4 b^6 c^2 x^3 y z^2-12 a^2 b^8 c^2 x^3 y z^2+7 a^6 b^2 c^4 x^3 y z^2-15 a^4 b^4 c^4 x^3 y z^2-15 a^2 b^6 c^4 x^3 y z^2+7 b^8 c^4 x^3 y z^2-a^4 b^2 c^6 x^3 y z^2+30 a^2 b^4 c^6 x^3 y z^2-b^6 c^6 x^3 y z^2-9 a^2 b^2 c^8 x^3 y z^2-9 b^4 c^8 x^3 y z^2+5 b^2 c^10 x^3 y z^2+2 a^12 x y^3 z^2-6 a^10 b^2 x y^3 z^2+4 a^8 b^4 x y^3 z^2+4 a^6 b^6 x y^3 z^2-6 a^4 b^8 x y^3 z^2+2 a^2 b^10 x y^3 z^2+12 a^8 b^2 c^2 x y^3 z^2-24 a^6 b^4 c^2 x y^3 z^2+12 a^4 b^6 c^2 x y^3 z^2-7 a^8 c^4 x y^3 z^2+15 a^6 b^2 c^4 x y^3 z^2+15 a^4 b^4 c^4 x y^3 z^2-7 a^2 b^6 c^4 x y^3 z^2+a^6 c^6 x y^3 z^2-30 a^4 b^2 c^6 x y^3 z^2+a^2 b^4 c^6 x y^3 z^2+9 a^4 c^8 x y^3 z^2+9 a^2 b^2 c^8 x y^3 z^2-5 a^2 c^10 x y^3 z^2+a^10 c^2 y^4 z^2-a^8 b^2 c^2 y^4 z^2-a^6 b^4 c^2 y^4 z^2+a^4 b^6 c^2 y^4 z^2+a^8 c^4 y^4 z^2+6 a^6 b^2 c^4 y^4 z^2+a^4 b^4 c^4 y^4 z^2-5 a^6 c^6 y^4 z^2-5 a^4 b^2 c^6 y^4 z^2+3 a^4 c^8 y^4 z^2+a^8 b^4 x^3 z^3-3 a^6 b^6 x^3 z^3+3 a^4 b^8 x^3 z^3-a^2 b^10 x^3 z^3-2 a^6 b^4 c^2 x^3 z^3+a^4 b^6 c^2 x^3 z^3+b^10 c^2 x^3 z^3-a^2 b^6 c^4 x^3 z^3-3 b^8 c^4 x^3 z^3+2 a^2 b^4 c^6 x^3 z^3+3 b^6 c^6 x^3 z^3-b^4 c^8 x^3 z^3-5 a^10 b^2 x^2 y z^3+9 a^8 b^4 x^2 y z^3+a^6 b^6 x^2 y z^3-7 a^4 b^8 x^2 y z^3+2 b^12 x^2 y z^3+9 a^8 b^2 c^2 x^2 y z^3-30 a^6 b^4 c^2 x^2 y z^3+15 a^4 b^6 c^2 x^2 y z^3+12 a^2 b^8 c^2 x^2 y z^3-6 b^10 c^2 x^2 y z^3+a^6 b^2 c^4 x^2 y z^3+15 a^4 b^4 c^4 x^2 y z^3-24 a^2 b^6 c^4 x^2 y z^3+4 b^8 c^4 x^2 y z^3-7 a^4 b^2 c^6 x^2 y z^3+12 a^2 b^4 c^6 x^2 y z^3+4 b^6 c^6 x^2 y z^3-6 b^4 c^8 x^2 y z^3+2 b^2 c^10 x^2 y z^3-2 a^12 x y^2 z^3+7 a^8 b^4 x y^2 z^3-a^6 b^6 x y^2 z^3-9 a^4 b^8 x y^2 z^3+5 a^2 b^10 x y^2 z^3+6 a^10 c^2 x y^2 z^3-12 a^8 b^2 c^2 x y^2 z^3-15 a^6 b^4 c^2 x y^2 z^3+30 a^4 b^6 c^2 x y^2 z^3-9 a^2 b^8 c^2 x y^2 z^3-4 a^8 c^4 x y^2 z^3+24 a^6 b^2 c^4 x y^2 z^3-15 a^4 b^4 c^4 x y^2 z^3-a^2 b^6 c^4 x y^2 z^3-4 a^6 c^6 x y^2 z^3-12 a^4 b^2 c^6 x y^2 z^3+7 a^2 b^4 c^6 x y^2 z^3+6 a^4 c^8 x y^2 z^3-2 a^2 c^10 x y^2 z^3+a^10 b^2 y^3 z^3-3 a^8 b^4 y^3 z^3+3 a^6 b^6 y^3 z^3-a^4 b^8 y^3 z^3-a^10 c^2 y^3 z^3-a^6 b^4 c^2 y^3 z^3+2 a^4 b^6 c^2 y^3 z^3+3 a^8 c^4 y^3 z^3+a^6 b^2 c^4 y^3 z^3-3 a^6 c^6 y^3 z^3-2 a^4 b^2 c^6 y^3 z^3+a^4 c^8 y^3 z^3+3 a^8 b^4 x^2 z^4-5 a^6 b^6 x^2 z^4+a^4 b^8 x^2 z^4+a^2 b^10 x^2 z^4-5 a^6 b^4 c^2 x^2 z^4+6 a^4 b^6 c^2 x^2 z^4-a^2 b^8 c^2 x^2 z^4+a^4 b^4 c^4 x^2 z^4-a^2 b^6 c^4 x^2 z^4+a^2 b^4 c^6 x^2 z^4+a^10 b^2 x y z^4-2 a^8 b^4 x y z^4+2 a^4 b^8 x y z^4-a^2 b^10 x y z^4-3 a^8 b^2 c^2 x y z^4+a^6 b^4 c^2 x y z^4-a^4 b^6 c^2 x y z^4+3 a^2 b^8 c^2 x y z^4+3 a^6 b^2 c^4 x y z^4-3 a^2 b^6 c^4 x y z^4-a^4 b^2 c^6 x y z^4+a^2 b^4 c^6 x y z^4-a^10 b^2 y^2 z^4-a^8 b^4 y^2 z^4+5 a^6 b^6 y^2 z^4-3 a^4 b^8 y^2 z^4+a^8 b^2 c^2 y^2 z^4-6 a^6 b^4 c^2 y^2 z^4+5 a^4 b^6 c^2 y^2 z^4+a^6 b^2 c^4 y^2 z^4-a^4 b^4 c^4 y^2 z^4-a^4 b^2 c^6 y^2 z^4=0