6 / 2 \ c *(1 + c)*\1 + c - c/
/ ___\ / ___\ | 1 I*\/ 3 | | 1 I*\/ 3 | (c + 1)*c*|c + - - + -------|*|c + - - - -------| \ 2 2 / \ 2 2 /
6 / 3\ c *\1 + c /