| 你 |
| 3 |
| 2 |
| 2 |
| 3 |
| 7 |
| 4 |
| b |
| n |
| 2n+你 |
| n |
| 2n+你 |
| 1 |
| x+1 |
| 1 |
| 5 |
| a2-b2 |
| a-b |
| 1 |
| x+1 |
| 1 |
| x+1 |
| 1 |
| 5 |
| a2-b2 |
| a-b |
| 1 |
| 5 |
| a2-b2 |
| a-b |
| 1 |
| a |
| 2xy |
| π |
| 3a2b3c |
| 4 |
| 5 |
| 6+x |
| 10 |
| y |
| x2 |
| x |
| 2x-y |
| 3 |
| 15 |
| x+y |
| 5a-b |
| 2x-y |
| 3a2-b2 |
| 4 |
| 1 |
| m |
| 5xy |
| 6 |
| 3 |
| x |
| x-y |
| 6 |
| 2 |
| 1-a |
| b |
| 1-π |
| 2 |
| x2+1 |
| x-y |
| π+1 |
| (x-y)2 |
| x-y |
| a-b八 |
| 4 |
| 1 |
| x |
| x-3 |
| 4 |
| 4x |
| π |
| 1 |
| x |
| x(x-1) |
| x |
| 1 |
| x |
| a |
| 3 |
| x |
| x-y |
| x+1 |
| π |
| 1 |
| y |
| 1 |
| 4 |
| 5 |
| x |
| 1 |
| 2 |
| x |
| 5 |
| x |
| π |
| 7 |
| 9x |
| 9ab2 |
| 8 |
| 1 |
| 5 |
| 3a+y |
| 7x |
| x |
| 15 |
| 9 |
| 2y |