| k-1 |
| x-1 |
| x |
| x-1 |
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| 3 |
| 1 |
| 2 |
| 1-x |
| x-2 |
| 1 |
| 2-x |
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| x-2 |
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| 2 |
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| x+1 |
| x |
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| 4 |
| x2-1 |
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