Example

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

Question

$$85 \times 15 ( - 3 ) ( 44 ) \div 355 + ( - 3 ) \times ( - 6 ) \}$$

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