z, y, x, 
7*y^4-20*x^2
2160*x^2*z^4+1512*x*z^4+315*z^4-4000*x^2-2800*x-490
40320000*x^6*y^2*z+67200000*x^5*y^3+28800000*x^5*y^2*z+94080000*x^4*y^3-23520000*x^4*y*z^2-10080000*x^4*z^3+40924800*x^3*y^3+21168000*x^3*y^2*z-41395200*x^3*y*z^2-28224000*x^3*z^3+2634240*x^2*y^3+4939200*x^2*y^2*z-26726560*x^2*y*z^2-15288000*x^2*z^3-2300844*x*y^3+347508*x*y^2*z-7727104*x*y*z^2-1978032*x*z^3-432180*y^3-852355*y*z^2-180075*z^3
