c_1, x_1, x_2, x_3, x_5, x_6, x_7, 
-c_1*(12608648*c_1*x_1^2+65397012*c_1*x_1*x_2+76680924*c_1*x_2^2-270192*x_1^3-1687858*x_1^2*x_2-2654151*x_1*x_2^2)
168*c_1^2+2*x_1*x_6+3*x_2*x_6
-8*x_1^2-38*x_1*x_2-39*x_2^2+392*x_3
-520*x_1^3-2158*x_1^2*x_2+1103*x_1*x_2^2+8871*x_2^3
-607076532*c_1^4*x_1^2-698528205*c_1^4*x_1*x_2+3425971329*c_1^4*x_2^2+98*x_1^4*x_5^2
2844132302295232*c_1^5*x_1^2+17053476964043728*c_1^5*x_1*x_2+25785630233528776*c_1^5*x_2^2+192231058619496*x_1^2*x_7+1157034173213334*x_1*x_2*x_7+1754651878664703*x_2^2*x_7
