Solution - Simplification or other simple results

Step  1  :

            4
 Simplify   —
            1

Equation at the end of step  1  :

  ((43) -  4) +  8

Step  2  :

 2.1     4 = 22

(4)³ = (2²)³ = 2⁶

Equation at the end of step  2  :

  (26 -  4) +  8

Step  3  :

Final result :

  68