Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

 (1): "a2"   was replaced by   "a^2". 

Step  1  :

Equation at the end of step  1  :

  (a2) -  (2•5a25)
 Step  2  :
 Step  3  :

Pulling out like terms :

 3.1     Pull out like factors :

   a² - 10a²⁵  =   -a² • (10a²³ - 1) 

Final result :

  -a2 • (10a23 - 1)