| b2 |
| 2a |
| b |
| a2 |
| 1 |
| ab |
| a2-b2 |
| b |
| ab |
| b-a |
| a+2 |
| a2-2a+1 |
| a2-4a+4 |
| a+1 |
| a2-4 |
| a2-1 |
| x2-1 |
| x2+2x+1 |
| 2x2-2 |
| 4x2+8x+4 |
| b2 |
| 2a |
| a6 |
| b3 |
| 1 |
| 2 |
| (a+b)2(a-b)2 |
| b2 |
| 1 |
| a2(a+b)2 |
| a2b2 |
| (a-b)2 |
| a+2 |
| (a-1)2 |
| (a-2)2 |
| a+1 |
| (a+1)(a-1) |
| (a+2)(a-2) |
| a-2 |
| a-1 |
| (x+1)(x-1) |
| (x+1)2 |
| 4(x+1)2 |
| 2(x+1)(x-1) |
| 1 |
| (x-1)2 |
| 2 |
| (x-1)2 |
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