Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

 (1): "a1"   was replaced by   "a^1". 

Step  1  :

Equation at the end of step  1  :

  7a11 • a

Step  2  :

Multiplying exponential expressions :

 2.1    a¹¹ multiplied by a¹ = a^{(11 + 1)} = a¹²

Final result :

  7a12