| 1 |
| 3-x |
| x3 |
| y |
| x5 |
| y2 |
| x7 |
| y3 |
| x9 |
| y4 |
| x2n+1 |
| yn |
| x2n+1 |
| yn |
| 5 |
| a |
| a |
| a+b |
| x2-b2 |
| x-b |
| x |
| 4 |
| 5 |
| a |
| a |
| a+b |
| x2-b2 |
| x-b |
| 5 |
| a |
| a |
| a+b |
| x2-b2 |
| x-b |
| x |
| 4 |
| x |
| 4 |
| 4 |
| a |
| 1 |
| 2 |
| x |
| 3 |
| x2-y2 |
| x+y |
| 3x |
| 2π |
| 1 |
| a |
| 3 |
| m |
| b |
| 3 |
| c |
| a-b |
| a+b |
| 2b |
| 3 |
| 4 |
| x2+2x+1 |
| 5 |
| m-n |
| m+n |
| b2 |
| a |
| b5 |
| a2 |
| b8 |
| a2 |
| b11 |
| a4 |
| b20 |
| a7 |
| b20 |
| a7 |
| xy2 |
| 2 |
| x |
| π |
| 1 |
| a+1 |
| 1 |
| x+y |
| m |
| 22-1 |
| 1 |
| a+1 |
| 1 |
| x+y |
| 1 |
| a+1 |
| 1 |
| x+y |
| x |
| y |
| 2 |
| 3 |
| 1 |
| 2 |
| 3 |
| 51y |
| x-y |
| 5 |
| 2 |
| 3 |
| 1 |
| 2 |
| x+y |
| 5 |
| 2 |
| 3 |
| 1 |
| 2 |
| x+y |
| 5 |
| x |
| y |
| 3 |
| 51y |
| x |
| y |
| 3 |
| 51y |
| x2 |
| 2x-1 |
| 4 |
| 5b+c |
| 3 |
| 7 |
| 2a |
| 3a |
| 2a |
| 3 |
| 1 |
| 2 |
| x2 |
| 2x-1 |
| 4 |
| 5b+c |
| 2a |
| 3a |
| x2 |
| 2x-1 |
| 4 |
| 5b+c |
| 2a |
| 3a |
| a |
| b-1 |
| a |
| b-1 |
| a |
| b-1 |