Example

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

Question

$$3 a _{ 2 } -a-4$$

Evaluate

$-a+3a_{2}-4$

Differentiate w.r.t. a_2

$3$

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