Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "^-3" was replaced by "^(-3)".

Step  1  :

 1.1     8 = 23

(8)^-3 = (2³)^(-3) = (2)^(-9)

Final result :

   1           
  —— = 0.00195 
  29