How many more soldiers did the States Army have than the the mobile army raised by Frederick Henry?
return the  States Army ;return Frederick Henry ;return the  mobile army raised by #2 ;return soldiers of #1 ;return soldiers of #3 ;return number of  #4 ;return number of  #5 ;return the  difference of #6 and  #7
['select', 'select', 'project', 'project', 'project', 'aggregate', 'aggregate', 'arithmetic']