t, z, y, x, 
2*t*x*y+y^2*z-2*x-z
4*t*x^2*y+2*t*y^3-x^3*z+4*x*y^2*z-10*t*y+4*x^2+4*x*z-10*y^2+2
t^2*x+2*t*y*z-x-2*z
2*t^3*y+4*t^2*x*z+4*t*y*z^2-x*z^3-10*t^2-10*t*y+4*x*z+4*z^2+2
