Solution - Simplification or other simple results

Step  1  :

 1.1     8 = 23

(8)⁷ = (2³)⁷ = 2²¹

Equation at the end of step  1  :

    d
  (—— • 221x7) • x
   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
  (— • 221x7) • x
   x
 Step  3  :

Multiplying exponential expressions :

 3.1    x⁶ multiplied by x¹ = x^{(6 + 1)} = x⁷

Final result :

  221x7