| 2x2 |
| 3y2 |
| 5y |
| 7x |
| 10y |
| 21x2 |
| x-1 |
| x+1 |
| x+1 |
| x+2 |
| x+3 |
| x2+4x+4 |
| 2x2 |
| 3y2 |
| 5y |
| 7x |
| 21x2 |
| 10y |
| x3 |
| y2 |
| x2+x-2-x2-2x-1 |
| (x+1)(x+2) |
| (x+2)2 |
| x+3 |
| x+2 |
| x+1 |
| 1 |
| 2x-1 |
| x |
| 1-2x |
| 1-2x+x2 |
| 1-2x |
| a2-1 |
| a2-5a+6 |
| a2+a-2 |
| a-3 |
| a+3 |
| a2-4 |
| 2x |
| x-3 |
| x |
| 3-x |
| 3a |
| a-1 |
| a |
| a+1 |
| a2-1 |
| a |
| 1 |
| a2-1 |
| a |
| a-1 |
| 1 |
| a-2 |
| 1 |
| a+2 |
| 2a |
| a2-4a+4 |
| -a2+4b2 |
| -4b2-a2+4ab |
| 3 |
| 4 |
| 3 |
| 2 |
| (2a-a2)(a2+4a+3) |
| (a2+a)(a2-5a+6) |
| a |
| b |
| a2-4ab+3b2 |
| a2-8ab+7b2 |
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