Solution - Simplification or other simple results

Step  1  :

 1.1     10 = 2•5

(10)¹⁸ = (2•5)¹⁸ = 2¹⁸ • 5¹⁸

Equation at the end of step  1  :

  5 • (218•518)

Step  2  :

Multiplying exponents :

 2.1    5¹  multiplied by  5¹⁸   = 5^{(1 + 18)} = 5¹⁹

Final result :

  (519•218)