Solution - Simplification or other simple results

Step  1  :

            d
 Simplify   —
            d

Equation at the end of step  1  :

  (1 • x) • xf

Step  2  :

Multiplying exponential expressions :

 2.1    x¹ multiplied by x¹ = x^{(1 + 1)} = x²

Final result :

  x2f