| a3-b3 |
| 3ab2 |
| a2+ab-2b2 |
| 2b2+3ab+a2 |
| 1 |
| x-1 |
| 1 |
| x+1 |
| 2x |
| x2+1 |
| 4x3 |
| x4+1 |
| x |
| a-b |
| y |
| b-c |
| z |
| c-a |
| ||||
|
| (a3-b3)-(a-b)3 |
| a3+8b3 |
| x |
| 2 |
| y |
| 3 |
| 9x+y-18 |
| 9x-y-18 |
| 1 |
| 2 |
| 11 |
| 5 |
| 2x-1 |
| 3 |
| 10x+1 |
| 12 |
| 2x+1 |
| 4 |
| 1 |
| 2 |
| 1 |
| 2 |
| 2 |
| 3 |
| x |
| y |
| z |
| x |
| 1 | ||
1-
|
| 1 | ||||||||
2个
|
| 1 | ||||||||||
1990个
|
| a2-v2+2v-1 |
| a2-v2+a+v |
| 1 |
| x |
| 1 |
| y |
| 2(8a2-1b2) |
| 1a2-8b2 |
| 3a+2b |
| 2a+3b |
| 3a-2b |
| 2a-3b |