Solution - Simplification or other simple results

Step  1  :

            11
 Simplify   ——
            5 

Equation at the end of step  1  :

    51      21       11
  ((——•20)-(——•20))-(——•20)
    2       2        5 

Step  2  :

            21
 Simplify   ——
            2 

Equation at the end of step  2  :

    51           21           
  ((—— • 20) -  (—— • 20)) -  44
    2            2            

Step  3  :

            51
 Simplify   ——
            2 

Equation at the end of step  3  :

    51                  
  ((—— • 20) -  210) -  44
    2                   

Step  4  :

Final result :

  256