Example

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

Question

$$\hat{f}(2)=\binom{4}{2}(l_{4})^{2}\binom{3}{4}^{4-2}=$$

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