Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

 (1): "x2"   was replaced by   "x^2". 

Step  1  :

Equation at the end of step  1  :

  (9 • (x2)) -  (2•3•5x25)
 Step  2  :

Equation at the end of step  2  :

  32x2 -  (2•3•5x25)

Step  3  :

Step  4  :

Pulling out like terms :

 4.1     Pull out like factors :

   9x² - 30x²⁵  =   -3x² • (10x²³ - 3) 

Final result :

  -3x2 • (10x23 - 3)