x_1, x_10, x_2, x_3, x_4, x_5, x_6, x_7, x_8, x_9, 
3*x_1*x_2-6*x_1+x_2+5
5*x_1*x_3+5*x_1+3*x_3+55
8*x_10*x_2+4*x_10+3*x_2-51
2*x_10*x_9+3*x_10+2*x_9+8
7*x_3*x_4+9*x_3+9*x_4+19
3*x_4*x_5+6*x_4+5*x_5-4
6*x_5*x_6+6*x_5+7*x_6+118
x_6*x_7+3*x_6+9*x_7+27
6*x_7*x_8+7*x_7+x_8+72
9*x_8*x_9+7*x_8+x_9+35
