Example

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

Question

$$r^{2}(x-y)-3(y-x)$$

Evaluate

$\left(x-y\right)\left(r^{2}+3\right)$

Expand

$xr^{2}+3x-yr^{2}-3y$

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