Solution - Simplification or other simple results

Step  1  :

            7
 Simplify   —
            5

Equation at the end of step  1  :

        7         7
  0 -  (— • (0 -  —))
        2         5

Step  2  :

            7
 Simplify   —
            2

Equation at the end of step  2  :

        7   -7
  0 -  (— • ——)
        2   5 

Step  3  :

Final result :

  49           
  —— = 4.90000 
  10