How many is the difference in the yards of the TD run by Howard and the yards of the field goal made by Barth?
return Howard ;return TD run of #1 ;return yards  of #2 ;return Barth ;return field goal of #4 ;return yards  of #5 ;return difference of #3 and  #6
['select', 'project', 'project', 'select', 'project', 'project', 'arithmetic']