Solution - Raising to a power

Step  1  :

Equation at the end of step  1  :

         (52)
  ((15)+—————)-5
        (250)
 Step  2  :

Equation at the end of step  2  :

           52     
  ((15) +  ——) -  5
           1      

Step  3  :

            52
 Simplify   ——
            1 

Equation at the end of step  3  :

  ((15) +  52) -  5

Step  4  :

Final result :

  21