Special punctuation
-- to an emdash —
... to an ellipsis character …
<- to an arrow ←
-> to an arrow →
Quotation marks
“Smart” double quotes
‘Smart’ single quotes
<< to left-pointing double angle quotation mark «
> \> to right-pointing double angle quotation mark »
Math symbols
+/- to plus/minus sign ±
!= to a not equal sign ≠
2*3 or 2x3 to a multiplication sign 2×3
Fractions
1/2 to one half ½
1/4 to one quarter ¼
3/4 to three quarters ¾
Symbols
(c) to a copyright sign ©
(r) to registered trademark sign ®
(tm) to registered trademark sign ™
(sm) to registered trademark sign ℠