Solution - Simplification or other simple results

Step  1  :

 1.1     8 = 23

(8)² = (2³)² = 2⁶

Equation at the end of step  1  :

  (3 • 26) -  4

Step  2  :

Equation at the end of step  2  :

  (3•26) -  4

Step  3  :

Final result :

  188