Solution - Simplification or other simple results

Step  1  :

 1.1     10 = 2•5

(10)¹⁵ = (2•5)¹⁵ = 2¹⁵ • 5¹⁵

Equation at the end of step  1  :

  5 • (215•515)

Step  2  :

Multiplying exponents :

 2.1    5¹  multiplied by  5¹⁵   = 5^{(1 + 15)} = 5¹⁶

Final result :

  (516•215)