Example

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

Question

$$x- \frac{ 1 }{ x } =5, { \left(x+ \frac{ 1 }{ x } \right) }^{ 2 } =$$

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