c_1, x_1, x_2, x_3, x_5, x_6, 
c_1
x_2
-40*c_1^2+x_1*x_3+2*x_3
60*c_1^2+x_1*x_5+2*x_5
16*c_1^5*x_1-48*c_1^5+x_1*x_6+2*x_6
