Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

 (1): "a4"   was replaced by   "a^4". 

Step  1  :

Equation at the end of step  1  :

  (0 -  (12 • (a2))) -  (2•5a42)
 Step  2  :

Equation at the end of step  2  :

  (0 -  (22•3a2)) -  (2•5a42)

Step  3  :

Step  4  :

Pulling out like terms :

 4.1     Pull out like factors :

   -10a⁴² - 12a²  =   -2a² • (5a⁴⁰ + 6) 

Final result :

  -2a2 • (5a40 + 6)