diff --git a/.XCompose b/.XCompose
index 7401376..44ad64c 100644
--- a/.XCompose
+++ b/.XCompose
@@ -33,26 +33,76 @@ include "%L"
 <Multi_key> <i> <n> <t>                 : "∫"   U222B     # INTEGRAL
 <Multi_key> <s> <q> <r> <t>             : "√"   U221A     # SQUARE ROOT
 <Multi_key> <asciitilde> <equal>        : "≈"   U2248     # ALMOST EQUAL TO
+<Multi_key> <forwardslash> <equal>      : "≠"   U2260     # NOT EQUAL TO
 <Multi_key> <i> <n> <f>                 : "∞"   U221E     # INFINITY
+<Multi_key> <l> <c> <e>                 : "⌈"   U2308     # LEFT CEILING
+<Multi_key> <r> <c> <e>                 : "⌉"   U2309     # RIGHT CEILING
+<Multi_key> <l> <f> <l>                 : "⌊"   U230A     # LEFT FLOOR
+<Multi_key> <r> <f> <l>                 : "⌋"   U230B     # RIGHT FLOOR
 
 # superscript
+<Multi_key> <asciicircum> <2>           : "²"   U00B2     # SUPERSCRIPT TWO
+<Multi_key> <asciicircum> <3>           : "³"   U00B3     # SUPERSCRIPT THREE
+<Multi_key> <asciicircum> <1>           : "¹"   U00B9     # SUPERSCRIPT ONE
+<Multi_key> <asciicircum> <h>           : "ʰ"   U02B0     # MODIFIER LETTER SMALL H
+<Multi_key> <asciicircum> <j>           : "ʲ"   U02B2     # MODIFIER LETTER SMALL J
+<Multi_key> <asciicircum> <r>           : "ʳ"   U02B3     # MODIFIER LETTER SMALL R
+<Multi_key> <asciicircum> <y>           : "ʸ"   U02B8     # MODIFIER LETTER SMALL Y
+<Multi_key> <asciicircum> <w>           : "ʷ"   U02B7     # MODIFIER LETTER SMALL W
+<Multi_key> <asciicircum> <l>           : "ˡ"   U02E1     # MODIFIER LETTER SMALL L
+<Multi_key> <asciicircum> <x>           : "ˣ"   U02E3     # MODIFIER LETTER SMALL X
+<Multi_key> <asciicircum> <a>           : "ᵃ"   U1D43     # MODIFIER LETTER SMALL A
+<Multi_key> <asciicircum> <e>           : "ᵉ"   U1D49     # MODIFIER LETTER SMALL E
+<Multi_key> <asciicircum> <k>           : "ᵏ"   U1D4F     # MODIFIER LETTER SMALL K
+<Multi_key> <asciicircum> <z>           : "ᶻ"   U1DBB     # MODIFIER LETTER SMALL Z
+<Multi_key> <asciicircum> <0>           : "⁰"   U2080     # SUPERSCRIPT ZERO
+<Multi_key> <asciicircum> <i>           : "ⁱ"   U2071     # SUPERSCRIPT LATIN SMALL LETTER I
+<Multi_key> <asciicircum> <4>           : "⁴"   U2074     # SUPERSCRIPT FOUR
+<Multi_key> <asciicircum> <5>           : "⁵"   U2075     # SUPERSCRIPT FIVE
+<Multi_key> <asciicircum> <6>           : "⁶"   U2076     # SUPERSCRIPT SIX
+<Multi_key> <asciicircum> <7>           : "⁷"   U2077     # SUPERSCRIPT SEVEN
+<Multi_key> <asciicircum> <8>           : "⁸"   U2078     # SUPERSCRIPT EIGHT
+<Multi_key> <asciicircum> <9>           : "⁹"   U2079     # SUPERSCRIPT NINE
 <Multi_key> <asciicircum> <plus>        : "⁺"   U207A     # SUPERSCRIPT PLUS SIGN
 <Multi_key> <asciicircum> <minus>       : "⁻"   U207B     # SUPERSCRIPT MINUS
 <Multi_key> <asciicircum> <equal>       : "⁼"   U207C     # SUPERSCRIPT EQUALS SIGN
 <Multi_key> <asciicircum> <braceleft>   : "⁽"   U207D     # SUPERSCRIPT LEFT PARENTHESIS
 <Multi_key> <asciicircum> <braceright>  : "⁾"   U207E     # SUPERSCRIPT RIGHT PARENTHESIS
-<Multi_key> <asciicircum> <a>           : "ᵃ"   U1D43     # MODIFIER LETTER SMALL A
-<Multi_key> <asciicircum> <e>           : "ᵉ"   U1D49     # MODIFIER LETTER SMALL E
-<Multi_key> <asciicircum> <h>           : "ʰ"   U02B0     # MODIFIER LETTER SMALL H
-<Multi_key> <asciicircum> <i>           : "ⁱ"   U2071     # SUPERSCRIPT LATIN SMALL LETTER I
-<Multi_key> <asciicircum> <j>           : "ʲ"   U02B2     # MODIFIER LETTER SMALL J
-<Multi_key> <asciicircum> <k>           : "ᵏ"   U1D4F     # MODIFIER LETTER SMALL K
 <Multi_key> <asciicircum> <n>           : "ⁿ"   U207F     # SUPERSCRIPT LATIN SMALL LETTER N
-<Multi_key> <asciicircum> <l>           : "ˡ"   U02E1     # MODIFIER LETTER SMALL L
-<Multi_key> <asciicircum> <r>           : "ʳ"   U02B3     # MODIFIER LETTER SMALL R
-<Multi_key> <asciicircum> <w>           : "ʷ"   U02B7     # MODIFIER LETTER SMALL W
-<Multi_key> <asciicircum> <x>           : "ˣ"   U02E3     # MODIFIER LETTER SMALL X
-<Multi_key> <asciicircum> <y>           : "ʸ"   U02B8     # MODIFIER LETTER SMALL Y
-<Multi_key> <asciicircum> <z>           : "ᶻ"   U1DBB     # MODIFIER LETTER SMALL Z
+
+# subscript
+<Multi_key> <underscore> <i>            : "ᵢ"   U1D62     # LATIN SUBSCRIPT SMALL LETTER I
+<Multi_key> <underscore> <r>            : "ᵣ"   U1D63     # LATIN SUBSCRIPT SMALL LETTER R
+<Multi_key> <underscore> <u>            : "ᵤ"   U1D64     # LATIN SUBSCRIPT SMALL LETTER U
+<Multi_key> <underscore> <v>            : "ᵥ"   U1D65     # LATIN SUBSCRIPT SMALL LETTER V
+<Multi_key> <underscore> <0>            : "₀"   U2080     # SUBSCRIPT ZERO
+<Multi_key> <underscore> <1>            : "₁"   U2081     # SUBSCRIPT ONE
+<Multi_key> <underscore> <2>            : "₂"   U2082     # SUBSCRIPT TWO
+<Multi_key> <underscore> <3>            : "₃"   U2083     # SUBSCRIPT THREE
+<Multi_key> <underscore> <4>            : "₄"   U2084     # SUBSCRIPT FOUR
+<Multi_key> <underscore> <5>            : "₅"   U2085     # SUBSCRIPT FIVE
+<Multi_key> <underscore> <6>            : "₆"   U2086     # SUBSCRIPT SIX
+<Multi_key> <underscore> <7>            : "₇"   U2087     # SUBSCRIPT SEVEN
+<Multi_key> <underscore> <8>            : "₈"   U2088     # SUBSCRIPT EIGHT
+<Multi_key> <underscore> <9>            : "₉"   U2089     # SUBSCRIPT NINE
+<Multi_key> <underscore> <plus>         : "₊"   U208A     # SUBSCRIPT PLUS SIGN
+<Multi_key> <underscore> <minus>        : "₋"   U208B     # SUBSCRIPT MINUS
+<Multi_key> <underscore> <equal>        : "₌"   U208C     # SUBSCRIPT EQUALS SIGN
+<Multi_key> <underscore> <braceleft>    : "₍"   U208D     # SUBSCRIPT LEFT PARENTHESIS
+<Multi_key> <underscore> <braceright>   : "₎"   U208E     # SUBSCRIPT RIGHT PARENTHESIS
+<Multi_key> <underscore> <a>            : "ₐ"   U2090     # LATIN SUBSCRIPT SMALL LETTER A
+<Multi_key> <underscore> <e>            : "ₑ"   U2091     # LATIN SUBSCRIPT SMALL LETTER E
+<Multi_key> <underscore> <o>            : "ₒ"   U2D92     # LATIN SUBSCRIPT SMALL LETTER O
+<Multi_key> <underscore> <x>            : "ₓ"   U2093     # LATIN SUBSCRIPT SMALL LETTER X
+<Multi_key> <underscore> <h>            : "ₕ"   U2095     # LATIN SUBSCRIPT SMALL LETTER H
+<Multi_key> <underscore> <k>            : "ₖ"   U2096     # LATIN SUBSCRIPT SMALL LETTER K
+<Multi_key> <underscore> <l>            : "ₗ"   U2097     # LATIN SUBSCRIPT SMALL LETTER L
+<Multi_key> <underscore> <m>            : "ₘ"   U2098     # LATIN SUBSCRIPT SMALL LETTER M
+<Multi_key> <underscore> <n>            : "ₙ"   U2099     # LATIN SUBSCRIPT SMALL LETTER N
+<Multi_key> <underscore> <p>            : "ₚ"   U209A     # LATIN SUBSCRIPT SMALL LETTER P
+<Multi_key> <underscore> <s>            : "ₛ"   U209B     # LATIN SUBSCRIPT SMALL LETTER S
+<Multi_key> <underscore> <t>            : "ₜ"   U209C     # LATIN SUBSCRIPT SMALL LETTER T
+<Multi_key> <underscore> <j>            : "ⱼ"   U2C7C     # LATIN SUBSCRIPT SMALL LETTER J
+
 
 <Multi_key> <space> <space>             : "\x09" U0009    # CHARACTER TABULATION