Solution - Simplification or other simple results

Step  1  :

            10
 Simplify   ——
            7 

Equation at the end of step  1  :

   2   42    10
  (— • ——) • ——
   3   5     7 

Step  2  :

            42
 Simplify   ——
            5 

Equation at the end of step  2  :

   2   42    10
  (— • ——) • ——
   3   5     7 

Step  3  :

            2
 Simplify   —
            3

Equation at the end of step  3  :

   2   42    10
  (— • ——) • ——
   3   5     7 

Step  4  :

Final result :

  8