| 1 |
| 1×2 |
| 1 |
| 2×3 |
| 1 |
| 3×4 |
| 1 |
| 9×10 |
| 1 |
| 1 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 9 |
| 1 |
| 10 |
| 1 |
| 1 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 9 |
| 1 |
| 10 |
| 1 |
| 10 |
| 9 |
| 10 |
| 1 |
| 1×3 |
| 1 |
| 3×5 |
| 1 |
| 5×7 |
| 1 |
| 19×21 |
| 1 |
| 1×4 |
| 1 |
| 4×7 |
| 1 |
| 7×10 |
| 1 |
| (3n-2)(3n+1) |
| a2-2a+1 |
| a2-1 |
| a2-a |
| 3a+3 |
| 3 |
| a3 |
| 1 |
| m |
| 1 |
| n |
| m+n |
| mn |
| n-m |
| m+n |
| n-m |
| m+n |
| 1+m |
| 1-m |
| x-1 |
| x+1 |
| 1 |
| a+1 |
| a2-a |
| a+1 |
| 1 |
| a-1 |
| 1 |
| a-1 |
| x2-1 |
| x2-2x+1 |
| x2-2x |
| x-2 |
| 2x |
| x-1 |
| 2x |
| x-1 |
| x+1 |
| x+6 |
| x2+x |
| x2-36 |
| x-6 |
| x |
| m |
| m+3 |
| 6 |
| mv-9 |
| v |
| m-3 |
| m-3 |
| m+3 |
| m-3 |
| m+3 |