Example

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

Question

$$\frac{ { 27 }^{ 3a+1 } }{ { 3 }^{ 7a-7 } \times { 3 }^{ 3a+15 } }$$

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