Unicode: 22B2. Infix ordering operator. x ⊲ y is by default interpreted as LeftTriangle[x,y]. Used in pure mathematics to mean 'normal subgroup of'.

Unicode: F7D9. Infix operator with built-in evaluation rules. x  y is by default interpreted as Equal[x,y] or x==y. \[LongEqual] is drawn longer than \[RawEqual]. Used as an ...

Unicode: 00B5. Alias: Esc mi Esc. Letter-like form. Used as a prefix in units to denote 10^-6. Not the same as \[Mu].

Unicode: 266E. Letter-like form. Used to denote musical notes. Sometimes used in mathematical notation, often as an inverse of numbering operations represented by \[Sharp].

Unicode: F383. Alias: Esc -␣␣ ␣ Esc. Negative spacing character. Used to bring characters on either side closer together. Width: -4/18 em. Interpreted by default just like an ...

Unicode: F384. Alias: Esc -␣␣ ␣␣ Esc. Negative spacing character. Used to bring characters on either side closer together. Width: -5/18 em. Interpreted by default just like ...

Unicode: F382. Alias: Esc -␣␣  Esc. Negative spacing character. Used to bring characters on either side closer together. Width: -3/18 em. Interpreted by default just like an ...

Unicode: F380. Alias: Esc -␣ Esc. Negative spacing character. Used to bring characters on either side closer together. Width: -1/18 em. Interpreted by default just like an ...

Unicode: 2060. Alias: Esc nb Esc. Letter-like form. Used to indicate that no line break can occur at this position in an expression.

Unicode: 00A0. Alias: Esc nbs Esc. Spacing character. Generates a space with the same width as \[RawSpace], but with no line break allowed to occur on either side of it.