Example

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

Question

$$( \frac{ 13 }{ 7 } { x }^{ 3a+2 } - \frac{ 15 }{ 6 } { y }^{ 2a-5 } )$$

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