Solution - Simplification or other simple results

Step  1  :

Equation at the end of step  1  :

  (53) • 54

Step  2  :

Equation at the end of step  2  :

  53 • 54

Step  3  :

Multiplying exponents :

 3.1    5³  multiplied by  5⁴   = 5^{(3 + 4)} = 5⁷

Final result :

  57