题目列表(包括答案和解析)
| 2x |
| x+2 |
| 3 |
| x-2 |
| 3 |
| x |
| 6 |
| x-1 |
| x+5 |
| x(x-1) |
| 1 |
| x-2 |
| 1 |
| 3x |
| 1 |
| x+1 |
| 2 |
| x-1 |
| 4 |
| x2-1 |
| 2 |
| x+5 |
| 1 |
| 2x-1 |
| x |
| x+2 |
| x+2 |
| x-2 |
| 8 |
| x2-4 |
| 6x-7 |
| 4x+5 |
| 10 |
| 3 |
| x-6 |
| x-5 |
| 1 |
| 5-x |
| x+3 |
| x+2 |
| x+1 |
| x-2 |
| x |
| x-2 |
| 6 |
| x+2 |
| 4 |
| x+1 |
| 5 |
| x-1 |
| 10 |
| x2-1 |
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