You can 
put this solution on YOUR website! 4b + 5d - c
———————————
     a 
There are three terms in the top, so draw three lines
                
————   ————   ——— 
                 
Put the signs of the terms in between the lines
                   
———— + ———— - ——— 
                  
Put the three terms in the numerators
 4b     5d     c
———— + ———— - ——— 
                    
Copy the same denominator under each fraction
 4b     5d     c
———— + ———— - ——— 
  a      a     a
It won't simplify so you're done.
Edwin
AnlytcPhil@aol.com