3*c + 1 ------- + c c - 1 ----------- c + 1
((3*c + 1)/(c - 1) + c)/(c + 1)
1 + 3*c + c*(-1 + c) -------------------- (1 + c)*(-1 + c)
(1 + 3*c + c*(-1 + c))/((1 + c)*(-1 + c))
1 + 3*c + c*(-1 + c) -------------------- (1 + c)*(-1 + c)
(1 + 3*c + c*(-1 + c))/((1 + c)*(-1 + c))
(c + (1.0 + 3.0*c)/(-1.0 + c))/(1.0 + c)
(c + (1.0 + 3.0*c)/(-1.0 + c))/(1.0 + c)