Solution - Simplification or other simple results

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "15.5" was replaced by "(155/10)".

Step  1  :

            31
 Simplify   ——
            2 

Equation at the end of step  1  :

         31
  (tan • ——) • 5280
         2 

Step  2  :

Final result :

  81840tan