source: [tag=IN] [lemma=simpler] [□] □
destination: [tag=IN] [lemma=simpler] [□=□] □
spec: Such option valuations may , in simpler cases , be based on analytical closed forms involving special functions , or , failing that , may require intensive numerical computation requiring some extensive programming . We need to get over the idea of the US as disinterested , all-powerful global police , which it obviously is not , and move towards the idea of countries cooperating to resolve conflict and defend themselves .