Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "^-4" was replaced by "^(-4)".

Step  1  :

 1.1     12 = 22•3

(12)^-4 = (2²•3)^(-4) = (2)^(-8) • (3)^(-4)

Final result :

     1              
  ——————— = 0.00005 
  (28•34)