/ ___\ / ___\ / ___\ / ___\
| 1 I*\/ 3 | | 1 I*\/ 3 | | 1 I*\/ 3 | | 1 I*\/ 3 |
(x + 1)*(x - 1)*|x + - + -------|*|x + - - -------|*|x + - - + -------|*|x + - - - -------|
\ 2 2 / \ 2 2 / \ 2 2 / \ 2 2 /
$$\left(x - 1\right) \left(x + 1\right) \left(x + \left(\frac{1}{2} + \frac{\sqrt{3} i}{2}\right)\right) \left(x + \left(\frac{1}{2} - \frac{\sqrt{3} i}{2}\right)\right) \left(x + \left(- \frac{1}{2} + \frac{\sqrt{3} i}{2}\right)\right) \left(x + \left(- \frac{1}{2} - \frac{\sqrt{3} i}{2}\right)\right)$$
(((((x + 1)*(x - 1))*(x + 1/2 + i*sqrt(3)/2))*(x + 1/2 - i*sqrt(3)/2))*(x - 1/2 + i*sqrt(3)/2))*(x - 1/2 - i*sqrt(3)/2)
/ 2\ / 2 \
-(1 + y)*(-1 + y)*\1 + y + y /*\1 + y - y/
$$- \left(y - 1\right) \left(y + 1\right) \left(y^{2} - y + 1\right) \left(y^{2} + y + 1\right)$$
-(1 + y)*(-1 + y)*(1 + y + y^2)*(1 + y^2 - y)