Example

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

Question

$$6 \times 9-2 \times { 3 }^{ 3 } +5 \times { 2 }^{ 3 } =$$

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