| 1 |
| x+1 |
| x-1 |
| x2-1 |
| 1 |
| x+1 |
| x+1 |
| (x+1)2 |
| 1 |
| x+1 |
| x2+1 |
| (x2+1)(x+1) |
| 1 |
| x+1 |
| x2 |
| x2(x-1) |
| 1 |
| x+1 |
| y |
| xy+y |
| 0.2x+0.03y |
| 0.5x-y |
| 20x-3y |
| 50x-100y |
| 2x |
| 2x-3三 |
| a |
| b |
| a+m |
| b+m |
| a |
| b |
| a-m |
| b-m |
| a |
| b |
| am |
| bm |
| a÷m |
| b÷m |
| a |
| b |
| 2xe |
| x+e |
| x-y |
| xy |
| x |
| y |
| 3 |
| 2 |
| 3 |
| 2 |
| x+y |
| y |
| 5 |
| 2 |
| 5 |
| 2 |
| 2(x+1) |
| x-1 |
| 3x2-3xy |
| xy-y2 |
| 3x |
| () |
| x |
| 5 |
| y |
| 4 |
| z |
| 人 |
| x+y+z |
| y+z |
| 12 |
| 7 |
| 12 |
| 7 |
| 1-x |
| 1+x-x2 |
| x-1 |
| x2-x-1 |
| x-1 |
| x2-x-1 |