| x-4 |
| x2-1 |
| x2-3x-4 |
| x2+2x+1 |
| 1 |
| x-1 |
| 3 |
| x-4 |
| (x+1)(x-1) |
| (x+1)2 |
| (x-4)(x+1) |
| 1 |
| x-1 |
| 2 |
| x-1 |
| 3 |
| ||
| 3 |
| 3 |
| a+1 |
| a2-4a+4 |
| a+1 |
| 3 |
| 3 |
| 1 |
| x+1 |
| 1 |
| 2x |
| 1 |
| x+y |
| x+y |
| 2x |
| 2 |
| a-3 |
| 2a-4 |
| 5 |
| a-2 |
| 3 |
| 2x2 |
| 3y2 |
| 5y |
| 6x |
| 10y |
| 21x2 |
| 2m-n |
| n-m |
| m |
| m-n |
| n |
| n-m |
| 1 |
| x+1 |
| 1 |
| x2-1 |
| x+1 |
| x2-2x+1 |
| 3 |
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