| x2-1 |
| x2-2x+1 |
| x2-5x |
| x-5 |
| 1 |
| a+1 |
| a+2 |
| a2-1 |
| a2-2a+1 |
| a2+4a+4 |
| x-4 |
| x2-1 |
| x2-3x-4 |
| x2+2x+1 |
| 1 |
| x-1 |
| 1 |
| (a-1)(b-1) |
| 1 |
| ab |
| 1 |
| (a+1)(b+1) |
| 1 |
| (a+2)(b+2) |
| 1 |
| (a+2着1着)(b+2着1着) |
| 2x |
| x2-4 |
| x-2 |
| x+2 |
| 3 |
| x |
| 6 |
| 1-x |
| x+5 |
| x2-x |
| 1 |
| k-1 |
| k2-4k+4 |
| k2-k |
| 1 |
| a+1 |
| a少-a |
| a+1 |
| 3 |
| x2-2x+1 |
| x2-x |
| 2 |
| x |
| 2 |
| 1 |
| x-1 |
| 1 |
| x2-1 |
|