question: How many yards longer was Barth's second field goal over his first one?
#1 return Barth 
#2 return field goals of #1 
#3 return the  second of #2 
#4 return the  first of #2 
#5 return yards of #3 
#6 return yards of #4 
#7 return the  difference of #5 and  #6