1‾‾ OVERLINE 2ℏℏℏ 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 24