Solution - Simplification or other simple results

Step  1  :

            7
 Simplify   —
            1

Equation at the end of step  1  :

  -7 +  7

Step  2  :

Pulling out like terms :

 2.1      Pull out     -7 

Note that  7 =(-1)• -7 
After pulling out, we are left with :
      -7 • ( (-1) - (-1) ))

Final result :

  0