Solution - Simplification or other simple results

Step  1  :

 1.1     10 = 2•5

(10)⁸ = (2•5)⁸ = 2⁸ • 5⁸

Equation at the end of step  1  :

  4 • (28•58)

Step  2  :

Multiplying exponents :

 2.1    2²  multiplied by  2⁸   = 2^{(2 + 8)} = 2¹⁰

Final result :

  (210•58)