Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

 (1): "y1"   was replaced by   "y^1". 

Step  1  :

Equation at the end of step  1  :

  (5 • (y2)) -  7y
 Step  2  :

Equation at the end of step  2  :

  5y2 -  7y

Step  3  :

Step  4  :

Pulling out like terms :

 4.1     Pull out like factors :

   5y² - 7y  =   y • (5y - 7) 

Final result :

  y • (5y - 7)