K774 :a*b^2*c^3*x^2*y - b*c^5*x^2*y - a^2*b*c^3*x*y^2 + a*c^5*x*y^2 + b^5*c*x^2*z - a*b^3*c^2*x^2*z - a^5*c*y^2*z + a^3*b*c^2*y^2*z - a*b^5*x*z^2 + a^2*b^3*c*x*z^2 +  a^5*b*y*z^2 - a^3*b^2*c*y*z^2 = 0