Example

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

Question

$$2(SI { N }^{ 6 } +CO { S }^{ 6 } )-3(SI { N }^{ 4 } +CO { S }^{ 4 } )=-1$$

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