/ ___________ ___________\ / ___________ ___________\ / ___________ ___________\ / ___________ ___________\
| / ___ / ___ | | / ___ / ___ | | / ___ / ___ | | / ___ / ___ |
| 3/4 / 1 \/ 2 3/4 / 1 \/ 2 | | 3/4 / 1 \/ 2 3/4 / 1 \/ 2 | | 3/4 / 1 \/ 2 3/4 / 1 \/ 2 | | 3/4 / 1 \/ 2 3/4 / 1 \/ 2 |
|x + 2 * / - - ----- + I*2 * / - + ----- |*|x + 2 * / - - ----- - I*2 * / - + ----- |*|x + - 2 * / - - ----- + I*2 * / - + ----- |*|x + - 2 * / - - ----- - I*2 * / - + ----- |
\ \/ 2 4 \/ 2 4 / \ \/ 2 4 \/ 2 4 / \ \/ 2 4 \/ 2 4 / \ \/ 2 4 \/ 2 4 /