Step  1  :
             d
 Simplify   ——
            dx
Canceling Out :
 1.1    Canceling out d  as it appears on both sides of the fraction line
Equation at the end of step  1  :
  1
  — • x23
  x
Step  2  :
Dividing exponential expressions :
 2.1    x23 divided by  x1 = x(23 - 1) = x22
Final result :
  x22