question: In Super Bowl XVII, how many more points did the Redskins make than the Miami Dolphins?
#1 return the  Redskins 
#2 return the  Miami Dolphins 
#3 return points of #1 
#4 return points of #2 
#5 return #3 in  Super Bowl XVII 
#6 return #4 in  Super Bowl XVII 
#7 return the  difference of #5 and  #6