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