x^2+y^2+z^2- ((x-y)*(y-z)*(x-z))^2=0
x^4*y-a*x*y^2*z+b*x*y^3+c*x*z^4+d*x*z^2+z^3-x^3*y*z+x^3...
a=0.06 (a*x^2+2ay^2+4az^2+4*y-1)*((ax^2+ay^2+az^2-2*y-...
[(y+sqrt(2)*sqrt(5+sqrt(5))/(5-sqrt(5))*(x-1))*(y-sqrt(...
x+y-z+x^2-(y^2-z^2+x^3)-1/a*(y^4-z^4+x^4)
x^4-x^3*y^2*z^2+x^3*y*z-y^3*x^2*z^2+y^3*x*z-z^3*x^2*y^2...
x^2+y^2-z^2-(a-0.5)+x^4+y^4-z^2-(a-0.5)