Solution - Simplification or other simple results

Step  1  :

Equation at the end of step  1  :

    d             
  (—— • (x5)) +  3x4
   dx             
 Step  2  :
             d
 Simplify   ——
            dx

Canceling Out :

 2.1    Canceling out d as it appears on both sides of the fraction line

Equation at the end of step  2  :

   1           
  (— • x5) +  3x4
   x           
 Step  3  :

Final result :

  4x4