↩ 🔵 🔵 🔵 ❪✺_❫ Algebraic Subs ○ ❪∂❫ Algebra Math ○ ❪∂_₀❫ Sub Portals ○ ❪∂_❫ Linear Subs ○ Common Logarithm (log₁₀₍x₎) ○◂ Exponential Function (eˣ) ○◂ Natural Logarithm (ln₍x₎) ○◂