↩ 🔵 🔵 🔵 ❪✺❫ Algebraic Concepts ○ ❪✺_❫ Mathematical Subs ○ ❪✺_❫ Boolean Subs ○ ❪✺_❫ Linear Subs ○ ❪✺_ₛₛ❫ Algebraic Subsets ○ ❪∂_❫ Algebraic Subs ○ Computer Algebra System (CAS) ○꠹