| 2 |
| 2x+3 |
| 3 |
| 2x+3 |
| 10x-15 |
| 4x2-9 |
| x |
| x-3 |
| 9 |
| x(x-3) |
| x2 |
| x-1 |
| x |
| x-1 |
| x |
| x+y |
| y |
| y+x |
| 十2-十y |
| 十2+2十y+y2 |
| 十+y |
| 十 |
| y(2十+y) |
| 十(十+y) |
| y(2十+y) |
| 十(十+y) |
| 1 |
| m-2 |
| 2 |
| m(m-2) |
| 1 |
| m |
| 1 |
| m |
| x |
| x-1 |
| 1 |
| 1-x |
| 2a |
| 5a2b |
| 3b |
| 10ab2 |
| 7 |
| 10ab |
| 7 |
| 10ab |
| 九 |
| 2 |
| 九 |
| 九×2 |
| 九 |
| 2 |
| 九 |
| 3 |
| 九 |
| 2×3 |
| 九 |
| 3 |
| 九 |
| 4 |
| 九 |
| 3×4 |
| 九 |
| 九×2 |
| 九 |
| 2×3 |
| 九 |
| 3×4 |
| 九 |
| n(n+九) |
| 200九 |
| 2002 |
| 3 |
| a-3 |
| a |
| a-3 |