1 ‾‾ OVERLINE
2 ℏℏℏ PLANCK CONSTANT OVER TWO PI
3 ↕↕ UP DOWN ARROW
4 ⇕⇕ UP DOWN DOUBLE ARROW
5 ⎛⎛ LEFT PARENTHESIS UPPER HOOK
6 ⎜⎜ LEFT PARENTHESIS EXTENSION
7 ⎝⎝ LEFT PARENTHESIS LOWER HOOK
8 ⎞⎞ RIGHT PARENTHESIS UPPER HOOK
9 ⎟⎟ RIGHT PARENTHESIS EXTENSION
10 ⎠⎠ RIGHT PARENTHESIS LOWER HOOK
11 ⎡⎡ LEFT SQUARE BRACKET UPPER CORNER
12 ⎢⎢ LEFT SQUARE BRACKET EXTENSION
13 ⎣⎣ LEFT SQUARE BRACKET LOWER CORNER
14 ⎤⎤ RIGHT SQUARE BRACKET UPPER CORNER
15 ⎥⎥ RIGHT SQUARE BRACKET EXTENSION
16 ⎦⎦ RIGHT SQUARE BRACKET LOWER CORNER
17 ⎧⎧ LEFT CURLY BRACKET UPPER HOOK
18 ⎨⎨ LEFT CURLY BRACKET MIDDLE PIECE
19 ⎩⎩ LEFT CURLY BRACKET LOWER HOOK
20 ⎪⎪⎪⎪ CURLY BRACKET EXTENSION
21 ⎫⎫ RIGHT CURLY BRACKET UPPER HOOK
22 ⎬⎬ RIGHT CURLY BRACKET MIDDLE PIECE
23 ⎭⎭ RIGHT CURLY BRACKET LOWER HOOK