Unicode: F74D. Alias: Esc ee Esc. Letter-like form with built-in value.  is interpreted by default as the symbol E, representing the exponential constant.

Unicode: F74E. Alias: Esc ii Esc. Letter-like form with built-in value.  is interpreted by default as the symbol I, representing Sqrt[-1].

Unicode: F523. Alias: Esc => Esc. Infix operator with built-in evaluation rules. x  y is by default interpreted as Implies[x,y]. x  y  z groups as x  (y  z). Not the ...

Unicode: 2329. Alias: Esc < Esc. Matchfix operator. ⟨ x ⟩ is by default interpreted as AngleBracket[x]. Used in the form ⟨x ⟩ to indicate expected or average value. Called ...

Unicode: F603. Alias: Esc l| Esc. Matchfix operator.  x  is by default interpreted as BracketingBar[x]. Used in mathematics to indicate absolute value (Abs), determinant ...

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: 220F. Alias: Esc prod Esc. Compound operator with built-in evaluation rules. ∏_(i)^i_max(f) is by default interpreted as Product[f,{i,i_max}]. ∏_(i=i_min)^i_max(f) ...

Unicode: 22C6. Alias: Esc star Esc. Infix operator. x ⋆ y is by default interpreted as Star[x,y]. Used to denote convolution and generalized forms of multiplication. ...

Unicode: 2211. Alias: Esc sum Esc. Compound operator with built-in evaluation rules. ∑_(i)^i_max(f) is by default interpreted as Sum[f,{i,i_max}]. ∑_(i=i_min)^i_max(f)f is by ...

Unicode: 00D7. Alias: Esc * Esc. Infix operator with built-in evaluation rules. x × y is by default interpreted as Times[x,y], which is equivalent to x y or x*y. Not the same ...