| 七 |
| x |
| 七 |
| 2 |
| 七 |
| 2 |
| 七 |
| x |
| 七 |
| 3 |
| 七 |
| 3 |
| 七 |
| x |
| 七 |
| 4 |
| 七 |
| 4 |
| 七 |
| x |
| 七 |
| 5 |
| 七 |
| 5 |
| 七 |
| 5 |
| 七 |
| x |
| 七 |
| a |
| 七 |
| a |
| 七 |
| a |
| 七 |
| x |
| 七 |
| 2 |
| y+2 |
| y+七 |
| 七0 |
| 3 |
| 2x+a |
| x-2 |
| 2-a |
| 3 |
| 2-a |
| 3 |
| 2x+a |
| x-2 |
| x-m |
| x-1 |
| 3 |
| x |
| 3x |
| x-2 |
| m |
| 2-x |
| 1 |
| x-1 |
| a |
| 2-x |
| 2(a+1) |
| x2-3x+2 |
| 3 |
| x-6 |
| x |
| 6-x |
| 6x+a |
| x-6 |
| ax-1 |
| 1-x |
| 5ax+3 |
| x-1 |
| m |
| x-4 |
| 1-x |
| 4-x |
| 2m+3 |
| x-2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 6 |
| x |
| ax |
| a+1 |
| 2 |
| x-1 |