2 |
x+3 |
2 |
3-x |
2x+18 |
x2-9 |
2 |
x+3 |
2 |
3-x |
2x+18 |
x2-9 |
2(x-3)-2(x+3)+2x+18 |
x2-9 |
2x+6 |
x2-9 |
2 |
x-3 |
3-x |
x-2 |
5 |
x-2 |
a+1 |
a-1 |
a |
a2-2a+1 |
1 |
a |
2 |
x-1 |
x+1 |
3a-1 |
a2-1 |
2 |
a+1 |
1 |
a2-2a+1 |
2 |
1 |
x-y |
1 |
x+y |
xy2 |
x2-y2 |
2 |
2 |
a2-4 |
a2-4a+4 |
1 |
a-2 |
a+1 |
a+2 |
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