| x |
| π |
| 2 |
| x |
| m+n |
| m-n |
| x |
| 4 |
| 2 |
| x |
| x+y |
| 5 |
| 1 |
| 2-a |
| x |
| π-1 |
| x+y |
| x-y |
| xy-y |
| 3 |
| 3 |
| 10 |
| 2 |
| 5+y |
| 3 |
| x |
| x |
| 4xy |
| 1 |
| a |
| 三xy |
| π |
| 3a三b3n |
| 4 |
| 5 |
| 6+x |
| x |
| 7 |
| y |
| 8 |
| 三x |
| x |
| 3 |
| x+y |
| 1 |
| m |
| 1 |
| 5 |
| 4x |
| π-3 |
| x2-y2 |
| 2 |
| 1 |
| x |
| 5x2 |
| x |
| ab |
| 5 |
| 2x2 |
| x |
| x2-1 |
| x+1 |
| 3x |
| 2x+y |
| 1 |
| y |
| 十 |
| 5 |
| 4x |
| π-3 |
| 十 |
| x |
| x地-它地 |
| 地 |
| 5x地 |
| x+十 |
| 8 |
| 个 |
| a+b |
| 2 |
| 个 |
| 2 |
| 1 |
| 个 |
| 3 |
| y |
| 个 |
| π-3 |
| 1 |
| x |
| x |
| 2 |
| 1 |
| 3 |
| 1 |
| 2 |
| 3 |
| x+y |