题目列表(包括答案和解析)
| 1 |
| x-y |
| 1 |
| x+y |
| 2x |
| x2+2xy+y2 |
| 1 |
| x-y |
| 1 |
| x+y |
| 2y |
| x2-2xy+y2 |
| 2 |
| 2 |
| 18 |
| 1 |
| 5 |
| 50 |
|
| 1 |
| 3 |
| 1 |
| x-y |
| 1 |
| x+y |
| 2y |
| x2-2xy+y2 |
| 2 |
| 2 |
| 1 |
| x-2 |
| 1-x |
| 2-x |
| 1 |
| x-y |
| 1 |
| x+y |
| 2x |
| x2+2xy+y2 |
| 1 |
| x-y |
| 1 |
| x+y |
| 2y |
| x2+2xy+y2 |
| 3 |
| 2 |
| 3 |
| 2 |
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