Example

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

Question

$$(2-x)-x(1-x2+x4)$$

Evaluate

$xx_{2}-xx_{4}-2x+2$

Expand

$xx_{2}-xx_{4}-2x+2$

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