Union ← ⍷∾
Inter ← ∊/⊣
Diff ← ¬∘∊/⊣
Subset ← ∧´∊
Eq ← ≡○∧
CreateSet ← ⍷

•Show 2‿4‿6‿8 Union 2‿3‿5‿7
•Show 2‿4‿6‿8 Inter 2‿3‿5‿7
•Show 2‿4‿6‿8 Diff 2‿3‿5‿7
•Show 2‿4‿6‿8 Subset 2‿3‿5‿7
•Show 2‿4‿6‿8 Eq 2‿3‿5‿7
•Show CreateSet 2‿2‿3‿5‿7‿2