-- -*- M2-comint -*- {* hash: 398816134 *} i1 : subsets(set {a,b,c},2) o1 = {set {a, b}, set {a, c}, set {b, c}} o1 : List i2 :
-- -*- M2-comint -*- {* hash: 398816134 *} i1 : subsets(set {a,b,c},2) o1 = {set {a, b}, set {a, c}, set {b, c}} o1 : List i2 :