Unicode encodes almost all standard mathematical characters. Mathematical Operators block (U+2200-U+22FF) contains mathematical notation. Supplemental Mathematical Operators block (U+2A00-U+2AFF) includes various mathematical symbols. Mathematical Alphanumeric Symbols block (U+1D400-U+1D7FF) contains Latin and Greek letters
Yen and yuan sign (¥) resembles capital letter Y with horizontal stroke. Usually placed before value (e.g. ¥50). Japanese kanji and Chinese characters follow amount (e.g. 50円)
Mathematical symbols represent objects, actions, and relationships in formulas. Decimal digits and Latin letters are the most basic symbols. Greek alphabet and Hebrew letters are increasingly used. Standard typeface is italic for Latin and lowercase Greek letters
Alt codes work on Windows computers using numeric pad. NumLock must be enabled for some Alt codes to work. Currency symbols require Alt+0128, 0156, 0155, etc. Mathematics symbols use Alt+246, 0215, 0177, etc. Special punctuation includes Alt+173, Alt+168, Alt+21
Plus symbol represents positive expressions and addition. Available in HTML as + and Unicode as U+0002B
Backslash symbol is used in computing and has multiple alternative names. Available in HTML as \ and Unicode at U+005C