˝˝ DOUBLE ACUTE ACCENT
ΑΑ GREEK CAPITAL LETTER ALPHA
ΒΒ GREEK CAPITAL LETTER BETA
+ ΓΓ GREEK CAPITAL LETTER GAMMA
ΔΔ GREEK CAPITAL LETTER DELTA
ΕΕ GREEK CAPITAL LETTER EPSILON
ΖΖ GREEK CAPITAL LETTER ZETA
ΟΟ GREEK CAPITAL LETTER OMICRON
ΠΠ GREEK CAPITAL LETTER PI
ΡΡ GREEK CAPITAL LETTER RHO
+ ΣΣ GREEK CAPITAL LETTER SIGMA
ΤΤ GREEK CAPITAL LETTER TAU
ΥΥ GREEK CAPITAL LETTER UPSILON
ΦΦ GREEK CAPITAL LETTER PHI
ℜℜ BLACK-LETTER CAPITAL R
™™ TRADE MARK SIGN
ℵℵ ALEF SYMBOL
+ ⅛⅛ VULGAR FRACTION ONE EIGHTH
+ ⅜⅜ VULGAR FRACTION THREE EIGHTHS
+ ⅝⅝ VULGAR FRACTION FIVE EIGHTHS
+ ⅞⅞ VULGAR FRACTION SEVEN EIGHTHS
←← LEFTWARDS ARROW
↑↑ UPWARDS ARROW
→→ RIGHTWARDS ARROW
∂∂ PARTIAL DIFFERENTIAL
∃∃ THERE EXISTS
∅∅ EMPTY SET
+ ∇∇ NABLA
∈∈ ELEMENT OF
+ ∉∉ NOT AN ELEMENT OF
∋∋ CONTAINS AS MEMBER
−− MINUS SIGN
∓∓ MINUS-OR-PLUS SIGN
⌊⌊ LEFT FLOOR
⌋⌋ RIGHT FLOOR
⎪⎪ CURLY BRACKET EXTENSION
+ ⎯⎯ HORIZONTAL LINE EXTENSION
││ BOX DRAWINGS LIGHT VERTICAL
□□ WHITE SQUARE
◊◊ LOZENGE