Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "2.5" was replaced by "(25/10)".

Step  1  :

            5
 Simplify   —
            2

Equation at the end of step  1  :

  5
  — • 8
  2

Step  2  :

Final result :

  20