| 1 |
| a+1 |
| a2-a |
| a+1 |
| 1 |
| 2 |
| x+2 |
| x2-4 |
| 2x-5 |
| x2-4x+4 |
| x-3 |
| x-2 |
| 3 |
| x2-1 |
| x2-2x+1 |
| x2-5x |
| x-5 |
| x2-1 |
| x2-2x+1 |
| x2-2x |
| x-2 |
| 3x |
| x-1 |
| x |
| x+1 |
| x |
| x2-1 |
| 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) |
| x2+2xy+y2 |
| 5x2-4xy |
| x+y |
| 5x-4y |
| x2-y |
| x |
| 1 |
| x-2 |
| x2-2x+1 |
| x2-4 |
| 1 |
| x+1 |
| 1 |
| x2-1 |
| x+1 |
| x2-2x+1 |
| 15 |
| x-1 |
| x-4 |
| x-1 |
| 3 |