c_1, c_2, x_1, x_2, x_3, x_4, x_5, x_6, x_7, x_8, 
c_1
x_2
x_4
x_6
x_8
-18928*c_2^2+169*x_5-434
33852*c_2^2+338*x_7+651
27040*c_2^4+1612*c_2^2+31
-114244000*c_1^2*c_2^2*x_1-114244000*c_2^4-1098500*c_1^2*x_1+5712200*c_2^2*x_3-847028*c_2^2+130975*x_3-23529
