x_1, x_2, 
x_1^3*x_2^2-2*x_2^5+2*x_1^4+4*x_1^3-486
2*x_1^2*x_2^3+2*x_1^4-3*x_1^2*x_2+2*x_1^2-5*x_2^2+45
