x_1, x_2, x_3, x_4, 
-11+x_2+x_3
2*x_1*x_2+x_3*x_4+x_1-19
4*x_1^2*x_2+x_3*x_4^2+x_1^2-2*x_1*x_2-x_3*x_4-x_1-36
8*x_1^3*x_2+x_3*x_4^3+x_1^3-12*x_1^2*x_2-3*x_3*x_4^2-3*x_1^2+4*x_1*x_2+2*x_3*x_4+2*x_1-126
16*x_1^4*x_2+x_3*x_4^4+x_1^4-48*x_1^3*x_2-6*x_3*x_4^3-6*x_1^3+44*x_1^2*x_2+11*x_3*x_4^2+11*x_1^2-12*x_1*x_2-6*x_3*x_4-6*x_1-360
