/ ___\ / ___\
| 7 3*I*\/ 3 | | 7 3*I*\/ 3 |
1*(a + 1)*|a + - - + ---------|*|a + - - - ---------|
\ 2 2 / \ 2 2 /
((1*(a + 1))*(a - (7/2 + 3*i*sqrt(3)/2)))*(a - (7/2 - 3*i*sqrt(3)/2))
/ 2 \ (1 + a)*\19 + a - 7*a/
(1 + a)*(19 + a^2 - 7*a)