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Evaluate each of the following without using a calculator.

`log_(1/7)(49) =`  

 `log_(1/2)(-1) =`  

 `log_(1/7)(1) =`  

 `log_(7)(49) =`  

 `log_(1/10)(10) =`  

 `log_(64)(8) =`  

 `log_(2)(2) =`