x_1, x_10, x_2, x_3, x_4, x_5, x_6, x_7, x_8, x_9, 
-2+x_1
-x_3*x_5*x_6^3*x_8+3*x_2
x_3-30000000
x_4-3
-x_1*x_4^3+12*x_5
x_6-50
-x_6*x_8+x_7
x_8-100
2*x_9-x_4
x_10*x_5-x_7*x_9
