2-x |
a+x |
2-x |
a+x |
2-x |
a+x |
2+x |
a-x |
a-x |
2+x |
2-x |
a+x |
a-x |
2+x |
2-x |
2+x |
2-x |
2+x |
2-x1 |
2+x1 |
2-x2 |
2+x2 |
(2-x1)(2+x2)-(2-x2)(2+x1) |
(2+x1)(2+x2) |
4(x2-x1) |
(2+x1)(2+x2) |
2-x1 |
2+x1 |
2-x2 |
2+x2 |
2-x1 |
2+x1 |
2-x2 |
2+x2 |
1-x |
1+x |
f(x) |
g(x) |
x+1 |
x-1 |
x+1 |
x-1 |
x+1 |
x-1 |
m |
(x-1)2(7-x) |
lg(1-x2) |
|x-2|-2 |
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