1 |
2 |
2 |
12 |
a-1 |
a |
a |
a+2 |
1 |
a2+2a |
3 |
3 |
3 |
a-1 |
a |
(a+1)(a-1) |
a(a+2) |
a-1 |
a |
a(a+2) |
(a+1)(a-1) |
a+2 |
a+1 |
a+1-a-2 |
a+1 |
-1 |
a+1 |
3 |
x |
x+1 |
3x2 |
1-x2 |
1 |
x-1 |
a2-ab |
a-b |
3 |
3 |
1 |
2 |
2 |
2 |
a2-1 |
1 |
a+1 |
x |
x2-1 |
1 |
x-1 |
3 |
12 |
1 |
2 |
2 |
x |
x-1 |
x2-x |
x2-1 |
1 |
x-1 |
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