Solution - Simplification or other simple results

Step  1  :

 1.1     10 = 2•5

(10)⁹⁹⁹ = (2•5)⁹⁹⁹ = 2⁹⁹⁹ • 5⁹⁹⁹

Equation at the end of step  1  :

  1 • (2999•5999)

Step  2  :

Final result :

  (2999•5999)