1 |
2 |
1 |
2 |
1 |
3 |
1 |
3 |
1 |
4 |
1 |
4 |
1 |
5 |
1 |
n |
1 |
n+1 |
1 |
2 |
1 |
2 |
1 |
3 |
1 |
3 |
1 |
4 |
1 |
4 |
1 |
5 |
1 |
2006 |
1 |
2007 |
1 |
2 |
1 |
2 |
1 |
3 |
1 |
3 |
1 |
4 |
1 |
4 |
1 |
5 |
1 |
2006 |
1 |
2007 |
1 |
2007 |
1 |
2007 |
1 |
a |
a2-2a+1 |
a-1 |
1 |
2x |
1 |
x+y |
x+y |
2x |
x2-y2 |
x+y |
1 |
3 |
n |
xn-1 |
a |
a-1 |
a2-a |
a2-1 |
1 |
a-1 |
x2-y2 |
x-y |
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