Example

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

Question

$$r ( n ) ( n + \frac { 1 } { 2 } )$$

Evaluate

$rn^{2}+\frac{nr}{2}$

Expand

$rn^{2}+\frac{nr}{2}$

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