Solution - Simplification or other simple results

Step  1  :

Equation at the end of step  1  :

  ((75) • (74)) • 72

Step  2  :

Equation at the end of step  2  :

  ((75) • 74) • 72

Step  3  :

Equation at the end of step  3  :

  (75 • 74) • 72
 Step  4  :

Multiplying exponents :

 4.1    7⁹  multiplied by  7²   = 7^{(9 + 2)} = 7¹¹

Final result :

  711