Example

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

Question

$$( 7 ) ^ { ( \sin ^ { 2 } x ) } + ( 7 ) ^ { ( \cos ^ { 2 } x ) } = 8$$

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