dx1:X1 = [-1.0e8,0]
dx2:X2 = [-1.0e8,0]
dx3:X3 = [-1.0e8,0]
dx4:X4 = [-1.0e8,0]
dx5:X5 = [-1.0e8,0]

c1:X1+   (5/432)*(X1+(1/7))^3+   (10/432)*(X2+(2/8))^3+(15/432)*(X3+(3/9))^3+(20/432)*(X4+(4/10))^3+(25/432)*(X5+(5/11))^3   = 0
c2:X2+   (4/432)*(X1+(1/7))^3+(8/432)*(X2+(2/8))^3+   (12/432)*(X3+(3/9))^3+(16/432)*(X4+(4/10))^3+(20/432)*(X5+(5/11))^3   = 0
c3:X3+   (3/432)*(X1+(1/7))^3+(6/432)*(X2+(2/8))^3+(9/432)*(X3+(3/9))^3+   (12/432)*(X4+(4/10))^3+(15/432)*(X5+(5/11))^3   = 0
c4:X4+   (2/432)*(X1+(1/7))^3+(4/432)*(X2+(2/8))^3+(6/432)*(X3+(3/9))^3+(8/432)*(X4+(4/10))^3+   (10/432)*(X5+(5/11))^3   = 0
c5:X5+   (1/432)*(X1+(1/7))^3+(2/432)*(X2+(2/8))^3+(3/432)*(X3+(3/9))^3+(4/432)*(X4+(4/10))^3+(5/432)*(X5+(5/11))^3   = 0
