Solution - Simplification or other simple results

Step  1  :

 1.1     6 = 2•3

(6)² = (2•3)² = 2² • 3²

Equation at the end of step  1  :

  108 -  (8 • (22•32))

Step  2  :

Multiplying exponents :

 2.1    2³  multiplied by  2²   = 2^{(3 + 2)} = 2⁵

Equation at the end of step  2  :

  108 -  (25•32)

Step  3  :

Final result :

  -180