-- -*- M2-comint -*- {* hash: 163993408 *} i1 : set{a,b,c} + set{a,d,f} o1 = set {a, b, c, d, f} o1 : Set i2 : x = apply(3, i -> set apply(3, j -> 10*i+j)) o2 = {set {0, 1, 2}, set {10, 11, 12}, set {20, 21, 22}} o2 : List i3 : sum x o3 = set {0, 1, 2, 10, 11, 12, 20, 21, 22} o3 : Set i4 :