题目列表(包括答案和解析)
| x+1 |
| x-1 |
| 4 |
| x2-1 |
| 3 |
| x-5 |
| x+2 |
| x-5 |
| x |
| x-1 |
| 2x-2 |
| x |
| 5x-4 |
| 2x-4 |
| 1 |
| 2 |
| 2x-5 |
| 3x-6 |
| 1 |
| 2x-4 |
| 1 |
| 2 |
| 3 |
| 2-x |
| x-2 |
| x+2 |
| 16 |
| x2-4 |
| 3 |
| 4-x |
| x-1 |
| 4-x |
| 5x-4 |
| 2x-4 |
| 2x+5 |
| 3x-6 |
| 1 |
| 2 |
| 1 |
| x-3 |
| x |
| 3-x |
| x |
| x-1 |
| 3 |
| (x-1)(x+2) |
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