Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$1/x+1+2/1+x2-4/1-x4$$

Evaluate

$x_{2}-x_{4}-1+\frac{1}{x}$

Factor

$x_{2}-x_{4}-1+\frac{1}{x}$

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