a2-1 |
a2+6a+9 |
a2-9 |
a-1 |
(a+1)(a-1) |
(a+3)2 |
1 |
a+1 |
(a+3)(a-3) |
a-1 |
a-3 |
a+3 |
x-1 |
x+2 |
x2-2x+1 |
x2-4 |
1 |
x-1 |
x-1 |
x+1 |
2x |
x2-1 |
1 |
x2-1 |
2011 |
2011 |
2011 |
a2+a |
a-1 |
a |
a-1 |
x2-2x+1 |
x2-1 |
x-1 |
x2+x |
1 |
a-1 |
a2-4a+4 |
a2-a |
x-2 |
x+2 |
4x |
x2-4 |
1 |
x2-4 |
3 |
2 |
3x |
2 |
x+y |
x+y |
3x |
x-y |
x |
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