Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "0.7" was replaced by "(7/10)".

Step  1  :

             7
 Simplify   ——
            10

Equation at the end of step  1  :

   7
 (——)12
  10

Step  2  :

 2.1     10 = 2•5 (10)¹² = (2•5)¹² = 2¹² • 5¹²

Final result :

     712              
  ————————— = 0.01384 
  (212•512)