Solution - Simplification or other simple results

Step  1  :

Equation at the end of step  1  :

  (75 -  (2 • (42))) +  23

Step  2  :

 2.1     4 = 22

(4)² = (2²)² = 2⁴

Equation at the end of step  2  :

  (75 -  (2 • 24)) +  23

Step  3  :

Multiplying exponents :

 3.1    2¹  multiplied by  2⁴   = 2^{(1 + 4)} = 2⁵

Equation at the end of step  3  :

  (75 -  25) +  23

Step  4  :

Final result :

  51