| 3x |
| x-1 |
| x |
| x+1 |
| x2-1 |
| x |
| x-1 |
| x2-4x+4 |
| x2-4 |
| x2-1 |
| 3x(x+1)-x(x-1) |
| x2-1 |
| x2-1 |
| x |
| 3x2+3x-x2+x |
| x |
| x-1 |
| (x-2)2 |
| (x+2)(x-2) |
| (x+1)(x-1) |
| x+2 |
| x2-x-2 |
| 3+2 |
| 32-3-2 |
| 5 |
| 4 |
| 3x(x+1)-x(x-1) |
| x2-1 |
| x2-1 |
| x |
| 3x2+3x-x2+x |
| x |
| x-1 |
| (x-2)2 |
| (x+2)(x-2) |
| (x+1)(x-1) |
| x+2 |
| x2-x-2 |
| 3+2 |
| 32-3-2 |
| 5 |
| 4 |
| m2-n2 |
| mn |
| 1 |
| m+n |
| 1 |
| m-n |
| n |
| m2-n2 |
| 2mn+n2 |
| m2 |
| 1 |
| a2 |
| 1 |
| a |
| 1 |
| a |
| 1 |
| a2 |
| 1 |
| a |
| y4 |
| y8-3y4+1 |
| x2+4x+4 |
| x+2 |
| 2 |
| a |
| a2-3a |
| 2a |
| a2-9 |
| a-2 |
| a2+6a+9 |
|