Example

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

Question

$$( - 1 ) ^ { 9 } \times ( - 1 ) ^ { 53 } \times ( - 1 ) ^ { 6 }$$

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