How many yards longer were the two longest touchdowns combined compared to the shortest touchdown?
return touchdowns ;return yards of #1 ;return longest of #2 ;return #2 besides  #3 ;return longest of #4 ;return shortest of #2 ;return sum of #3 and  #5 ;return difference of #7 and  #6
['select', 'project', 'aggregate', 'discard', 'aggregate', 'aggregate', 'arithmetic', 'arithmetic']