Solution - Simplification or other simple results

Step  1  :

 1.1     42 = 2•3•7

(42)³ = (2•3•7)³ = 2³ • 3³ • 7³

Equation at the end of step  1  :

  (23•33•73) • 2

Step  2  :

Multiplying exponents :

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

Final result :

  (24•33•73)