(((((x)^2-(y)^2+z)^2-(2*x*y)^2+z)^2-(2*(x)^2-(y)^2+z*2*x*y)^2+z)^2-(2*((x)^2-(y)^2+z)^2-(2*x*y)^2+z*2*(x)^2-(y)^2+z*2*x*y)^2+z)^2+(2*(((x)^2-(y)^2+z)^2-(2*x*y)^2+z)^2-(2*(x)^2-(y)^2+z*2*x*y)^2+z*2*((x)^2-(y)^2+z)^2-(2*x*y)^2+z*2*(x)^2-(y)^2+z*2*x*y)^2-4