Solution - Simplification or other simple results

Step  1  :

 1.1     10 = 2•5

(10)⁵ = (2•5)⁵ = 2⁵ • 5⁵

Equation at the end of step  1  :

  75 • (25•55)

Step  2  :

Multiplying exponents :

 2.1    5²  multiplied by  5⁵   = 5^{(2 + 5)} = 5⁷

Final result :

  (3•57•25)