Example

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

Question

$$( \frac { A _ { 4 } ^ { 3 } } { C _ { 4 } ^ { 3 } } ) ! \div 5 ! =$$

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