Example

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

Question

$$( \frac{ 297 }{ \frac{ \frac{ }{ } }{ } } \div 3+ \{ 4 \times 3(20-36 \div 5-2) \} ]$$

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