Example

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

Question

$$((221 { p }^{ 2 } { q }^{ 2 } +13p { q }^{ 2 } +17p { q }^{ 2 } )(- \frac{ 1 }{ 663pq } )$$

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