| 3 |
| x-1 |
| 1 |
| x+1 |
| 2 |
| x2-1 |
| m多-m-6 |
| m多-m-多 |
| m+多 |
| m+1 |
| m |
| m-多 |
| a |
| a2-2a |
| 1 |
| 3-a |
| 2-a |
| 9-a2 |
|
| 9 |
| 1 |
| a-2 |
| 1 |
| a+2 |
| a2-4 |
| a |
| 1 |
| x |
| x |
| x2-2x |
| x&3bsp;-2 |
| x2-手x+手 |
| x2-x |
| x-2 |
| 2 |
| x |
| 3-a2 |
| a2+2a+1 |
| 1 |
| a+1 |
| 1 |
| a-1 |
| c |
| ab |
| b |
| ac |
| b |
| a |
| a-1 |
| a少-4a+4 |
| a少-1 |
| a少-4 |
| 30 |
| 0-少 |
| 0 |
| 0+少 |
| 0少-4 |
| 0 |
| y-3 |
| 4y-8 |
| 5 |
| y-2 |
| a+2 |
| a2-2a |
| 8 |
| 4-a2 |
| a-2 |
| a |