Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "^-21" was replaced by "^(-21)".

Step  1  :

 1.1     10 = 2•5

(10)^-21 = (2•5)^(-21) = (2)^(-21) • (5)^(-21)

Equation at the end of step  1  :

  21 • ((2)(-21)•(5)(-21))

Step  2  :

Final result :

      21                                      
  ————————— = 2.10000 • 10-20 
  (221•521)