| x |
| y |
| a |
| b |
| x2+a2 |
| x+a |
| y2+b2 |
| y+b |
| (x+y)2+(a+b)2 |
| x+y+a+b |
| 1 |
| a-b |
| 1 |
| a+b |
| 2a |
| a2+b2 |
| 4a3 |
| a4+b4 |
| x2+yz |
| x2+(y-z)x-yz |
| y2-zx |
| y2+(z+x)y+zx |
| z2+xy |
| z2-(x-y)z-xy |
| x3-1 |
| x3+2x2+2x+1 |
| x3+1 |
| x3-2x2+2x-1 |
| 2(x2+1) |
| x2-1 |
| (y-x)(z-x) |
| (x-2y+z)(x+y-2z) |
| (z-y)(x-y) |
| (x+y-2z)(y+z-2x) |
| (x-z)(y-z) |
| (y+z-2x)(x-2y+z) |
| 4a |
| 4a+3b |
| 3 |
| 1+3b |
| 9b+12ab+16a |
| (4a+3b)(1+3b) |
| 7 |
| n(n+7) |
| 7 |
| n |
| 7 |
| n+7 |
| 7 |
| 7×2 |
| 7 |
| 2×3 |
| 7 |
| n(n+7) |
| 1 |
| a-1 |
| a |
| a-1 |
| x-2 |
| 3 |
| 3x+2 |
| 2 |
| 1 |
| m+1 |
| 1 |
| m(m+1) |
| y-1 |
| x-1 |
| y |
| x |
| y+手 |
| x+手 |
| y |
| x |