| x |
| 3 |
| y |
| 4 |
| f |
| 2 |
| 2x2-2y2+5f2 |
| xy+yf+fx |
| 36 |
| 44 |
| 36 |
| 44 |
| x+个 |
| x-2 |
| (x+个)(x-3) |
| (x-2)(x-3) |
| x |
| 2 |
| y |
| 3 |
| z |
| 4 |
| x+3y-z |
| 2x-y+z |
| 7 |
| 5 |
| 7 |
| 5 |
| 1 |
| x |
| 1 |
| y |
| 2x-xy+2y |
| 3x+5xy+3y |
| 3 |
| 11 |
| 3 |
| 11 |
0.4a-
| ||
|
| 4a-5b |
| 2a+3b |
| 4a-5b |
| 2a+3b |
| -a-b |
| -a+b |
| -a-b |
| -a+b |
| a+b |
| a-b |
| a+b |
| a-b |
| 3a |
| b-3 |
| x-y |
| x2-y2 |
| 1 |
| x-y |
| b-1 |
| c-1 |
| 1-b |
| 1-c |
| -x+y |
| -x-y |
| x-y |
| x+y |
| x-2y+z |
| xyz |
| xy |
| x+y |