Solution - Simplification or other simple results

Step  1  :

Equation at the end of step  1  :

  ((0 -  (23 • 2)) +  2) -  1

Step  2  :

Multiplying exponents :

 2.1    2³  multiplied by  2¹   = 2^{(3 + 1)} = 2⁴

Equation at the end of step  2  :

  ((0 -  24) +  2) -  1

Step  3  :

Final result :

  -15