| a+3a-4b |
| a-b |
| -2x-x+2y+y |
| y2-x2 |
| 3 |
| x+y |
| 12 |
| (m-3)(m+3) |
| 2(m+3) |
| (m-3)(m+3) |
| 2 |
| m+3 |
| 5 |
| 6ba2 |
| 2 |
| 3ab2 |
| 3 |
| 4abc |
| 10bc-8ac+9ab |
| 12a2b2c2 |
| 1 |
| a-1 |
| a |
| a-1 |
| 32 |
| 3-n |
| n2 |
| 3-n |
| x+3 |
| x+2 |
| 2-x |
| x2-4 |
| (x+3)(x-2) |
| x2-4 |
| x-2 |
| x2-4 |
| x2+x-6-x-2 |
| x2-4 |
| x2-8 |
| x2-4 |
| x+3 |
| x+2 |
| x-2 |
| (x+2)(x-2) |
| x+3 |
| x+2 |
| 1 |
| x+2 |
| x+3-1 |
| x+2 |
| b2 |
| 2n-b |
| fn2 |
| b-2n |
| 1 |
| m+1 |
| 1 |
| m(m+1) |