| x2-16 |
| x-4 |
| b |
| a |
| ab |
| a() |
| ||
| a+b |
| () |
| ca+cb |
| 3a+3b |
| 1c |
| a+b |
| () |
| a-b |
| 2a-b |
| b-a |
| 2a-b |
| b-a |
| 2a-b |
| -(a-2b) |
| 2a-b |
| a-2b |
| 2a-b |
| a-2b |
| 2a-b |
| x |
| x+1 |
| x2 |
| x2+x |
| 5(3a+1) |
| 7(3a+1) |
| 5 |
| 7 |
| 1 |
| 3 |
| 1 |
| 3 |
| x |
| x+y |
| ( ) |
| (x-y)(x+y) |
| 0.5x-1 |
| 0.3x+2 |
| 5x-10 |
| 3x+20 |
| 5x-10 |
| 3x+20 |
| 3 |
| x |
| 3(x+5) |
| x(x+5) |
| 0.3a+0.5b |
| 0.2a-b |
| 3a+5b |
| 2a-10b |
| 3a+5b |
| 2a-10b |
| -3x+1 |
| -x2+7x-2 |
| 3x-1 |
| x2-7x+2 |
| 3x-1 |
| x2-7x+2 |