| 1 |
| 3-x |
| 2-x |
| x-3 |
| x2-3x |
| x2-1 |
| 2x-1 |
| x-1 |
| x |
| x-2 |
| 4 |
| x-2 |
| x |
| x-2 |
| 2 |
| x2-4 |
| 1 |
| 2 |
| 7 |
| a2-1 |
| a2+4a+4 |
| a+1 |
| a+2 |
| x |
| x-2 |
| 1 |
| x2-4 |
| 5 |
| 3 |
| x |
| x-1 |
| 3 |
| 1-x |
| 1 |
| 1×2 |
| 1 |
| 2 |
| 1 |
| 2×3 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3×4 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 1×3 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3×5 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 5 |
| 1 |
| 5×7 |
| 1 |
| 2 |
| 1 |
| 5 |
| 1 |
| 7 |
| 1 |
| n(n+1) |
| 1 |
| n |
| 1 |
| n+1 |
| 1 |
| n |
| 1 |
| n+1 |
| 1 |
| x(x+1) |
| 1 |
| x+1 |
| 1 |
| n(n+3) |
| 1 |
| 3 |
| 1 |
| n |
| 1 |
| n+3 |
| 1 |
| 3 |
| 1 |
| n |
| 1 |
| n+3 |
| x-2 |
| 2x-1 |
| 1.5 |
| 1-2x |
| 1 |
| x+1 |
| x2-2x+1 |
| x2-1 |
| x-1 |
| x+1 |
| 1 |
| 2 |
| 1 |
| 2 |
| 12 |
| a+2 |
| 1-a2 |
| 2 |
| a+1 |
| a |
| 1-a |
| 3 |
| 1 |
| 3x-1 |
| 4 |
| 6x-2 |
|
| 1 |
| 2 |
|
| x |
| x+3 |
| 1 |
| x-2 |
| 2x-2 |
| x2-1 |
| 1 |
| x+1 |
| 1 |
| x-2 |
| 1 |
| 3x |
| 1 |
| x+1 |
| 2 |
| x-1 |
| 4 |
| x2-1 |
| 5 |
| x+1 |
| 4 |
| x |
| 5x-4 |
| 2x-4 |
| 1 |
| 2 |
| 2x+5 |
| 3x-6 |