| x2 |
| y-x |
| y2 |
| y-x |
| 3x-4 |
| (x-1)(x-2) |
| A |
| x-1 |
| B |
| x-2 |
| 2x |
| x+y |
| x-y |
| x+y |
| a |
| a-b |
| b |
| a-b |
| x-2y |
| x+y |
| 3y |
| x+y |
| 1 |
| 3×4 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| n(n+1) |
| 1 |
| n |
| 1 |
| n+1 |
| 1 |
| n(n+1) |
| 1 |
| n |
| 1 |
| n+1 |
| 1 |
| 1×s |
| 1 |
| s×3 |
| 1 |
| 3×4 |
| 1 |
| s00t×s008 |
| 1 |
| s008×s00j |
| s008 |
| s00j |
| s008 |
| s00j |
| 了 |
| a |
| 2 |
| a |
| 2 |
| a |
| 2 |
| a |
| a |
| a-b |
| b |
| b-a |
| 4 |
| 2-x |
| x2 |
| x-2 |
| x2 |
| x-2 |
| 1 |
| x |
| 1 |
| y |
| 1-5x |
| x2-1 |
| M |
| x+1 |
| N |
| x-1 |