/ 2 \ / 2 \ / 4 \ \c + 1/*\c - 1/*\c + 1/
(1.0 + c^2)*(1.0 + c^4)*(-1.0 + c^2)
8 -1 + c
/ 2\ / 4\ (1 + c)*\1 + c /*\1 + c /*(-1 + c)