/ ___ ___\ / ___ ___\ / ___ ___\ / ___ ___\
| \/ 2 I*\/ 2 | | \/ 2 I*\/ 2 | | \/ 2 I*\/ 2 | | \/ 2 I*\/ 2 |
a*|a + ----- + -------|*|a + ----- - -------|*|a + - ----- + -------|*|a + - ----- - -------|
\ 2 2 / \ 2 2 / \ 2 2 / \ 2 2 /
$$a \left(a + \left(\frac{\sqrt{2}}{2} + \frac{\sqrt{2} i}{2}\right)\right) \left(a + \left(\frac{\sqrt{2}}{2} - \frac{\sqrt{2} i}{2}\right)\right) \left(a + \left(- \frac{\sqrt{2}}{2} + \frac{\sqrt{2} i}{2}\right)\right) \left(a + \left(- \frac{\sqrt{2}}{2} - \frac{\sqrt{2} i}{2}\right)\right)$$
(((a*(a + sqrt(2)/2 + i*sqrt(2)/2))*(a + sqrt(2)/2 - i*sqrt(2)/2))*(a - sqrt(2)/2 + i*sqrt(2)/2))*(a - sqrt(2)/2 - i*sqrt(2)/2)