二項式

two items / binomial (math.)

two / 2 / (Beijing dialect) stupid

surname Xiang

back of neck / item / thing / term (in a mathematical formula) / sum (of money) / classifier for principles, items, clauses, tasks, research projects etc

type / form / pattern / style

(math.) binomial coefficient

a binomial coefficient (math.) / the number of combinations

the binomial theorem (math.)