x, y, z, 
8*x^2-2*x*y-6*x*z+3*y^2-7*y*z+10*z^2+3*x+10*y-8*z-4
10*x^2-2*x*y+6*x*z+9*y^2-y*z-2*z^2-6*x-4*y+5*z-9
5*x^2+8*x*y+4*x*z+9*y^2-6*y*z-z^2+8*x+2*y-7*z+5
