Solution - Power equations

Step  1  :

Equation at the end of step  1  :

  
 Step  2  :

Equation at the end of step  2  :

Step  3  :

            32y3
 Simplify   ————
            7y5 

Dividing exponential expressions :

 3.1    y³ divided by y⁵ = y^{(3 - 5)} = y^(-2) = ¹/_y²

Final result :

   9 
  ———
  7y2