| -4m2n2 |
| 2m3 |
| 2n2 |
| m |
| 2n2 |
| m |
| a2 |
| a+3 |
| 9 |
| a+3 |
| 2m |
| m+n |
| m-n |
| n+m |
| 4 |
| x(x2+4) |
| A |
| x |
| Bx+C |
| x2+4 |
| 左 |
| R |
| 左 |
| R左 |
| 左 |
| R5 |
| RR5 |
| R5-R |
| RR5 |
| R5-R |
| x |
| a |
| y |
| a |
| z |
| a |
| x+y+z |
| a |
| x+y+z |
| a |
| s |
| R |
| s |
| Rs |
| s |
| R2 |
| 1 |
| a |
| 3 |
| a |
| 4 |
| a |
| 4 |
| a |
| 2 |
| 3a |
| 1 |
| 2a |
| 1 |
| 6a |
| 1 |
| 6a |
| 1 |
| 4ab3 |
| 1 |
| 6a2b |
| 3a+2b2 |
| 12a2b3 |
| 3a+2b2 |
| 12a2b3 |
| 2 |
| m |
| 1 |
| 2m |
| 3 |
| 2m |
| 3 |
| 2m |
| x-1 |
| x-2 |
| 1 |
| 2-x |
| 3x |
| (x-3)2 |
| x |
| x-3 |
| x2 |
| (x-3)2 |
| x2 |
| (x-3)2 |
| 2n-m |
| 如nm |
| m+2n |
| 如mn |
| 2 |
| 如n |
| 2 |
| 如n |