How many more field goals over 30 yards did Tynes kick than Elam?
return Tynes ;return field goals of #1 ;return yards of #2 ;return #2 where #3 is higher than 30 ;return number of  #4 ;return Elam ;return field goals of #6 ;return yards of #7 ;return #7 where #8 is higher than 30 ;return number of  #9 ;return difference of #5 and  #10
['select', 'project', 'project', 'comparative', 'aggregate', 'select', 'project', 'project', 'comparative', 'aggregate', 'arithmetic']