Example

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

Question

$${ x }^{ 2 } -1| { x }^{ 2 } +2x+1$$

Evaluate

$-2x-1$

Differentiate w.r.t. x

$-2$

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