| a2-1 |
| a-1 |
| a2+b-a-b2 |
| a3-2a2b+ab2 |
| a+b-1 |
| a(a-b) |
| a+b-1 |
| a(a-b) |
| a2-b2 |
| a2+ab |
| a-b |
| a |
| a-b |
| a |
| x-1 |
| x+1 |
| ? |
| x2-1 |
| m2n+mn2 |
| 2m2n2 |
| m+n |
| 2mn |
| m+n |
| 2mn |
| m2-3m |
| 9-m2 |
| m |
| m+3 |
| m |
| m+3 |
| a2bc |
| ab |
| x2-4 |
| x2-4x+4 |
| x+2 |
| x-2 |
| x+2 |
| x-2 |
| 2x-2 |
| 1-x2 |
| 2 |
| x+1 |
| 2 |
| x+1 |
| ||
2+
|
| 1-2x |
| 2x+1 |
| 1-2x |
| 2x+1 |
| m2-16 |
| 3m-12 |
| m+4 |
| 3 |
| m+4 |
| 3 |
| -7a2x18 |
| 28a3x9 |
| x2-2x |
| 4-x2 |