| y1-2m |
| x1+m |
| y2-2m |
| x2+m |
| y2 |
| 2p |
|
| y1-2m |
| x1+m |
| y2-2m |
| x2+m |
| y2 |
| 2p |
| y1-2m | ||||
|
| y2-2m | ||||
|
| y1-2m | ||
|
| y2-2m | ||
|
| y1-2m | ||
|
| y2-2m | ||
|
| y1y2-2y2m-y1y2+2y1m |
| y1y2(y1-y2) |
| 4pm |
| y1y2 |
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