diff --git a/LaTeX/MathSymbols.tm b/LaTeX/MathSymbols.tm
index dc343d6..5b7f6f7 100644
--- a/LaTeX/MathSymbols.tm
+++ b/LaTeX/MathSymbols.tm
@@ -1,4 +1,4 @@
-<TeXmacs|2.1.2>
+<TeXmacs|2.1.3>
 
 <style|<tuple|generic|doc|compact-list>>
 
@@ -269,8 +269,23 @@
     \;
   </big-table>
 
-  <\big-table|<tabular|<tformat|<table|<row|<cell|>>>>>>
-    \;
+  <\big-table|<tformat|<table|<row|<cell|<math|<around*|(||\<nobracket\>>>>|<key|(>|<cell|>|<cell|<math|<around*|\<nobracket\>||)>>>|<cell|<key|)>>|<cell|>|<cell|<math|\<uparrow\>>>|<cell|<key|\<less\>
+  - Tab>>|<cell|>|<cell|<math|\<Uparrow\>>>|<cell|<key|= \<gtr\> Tab
+  Tab>>>|<row|<cell|>|<cell|<markup|(>>|<cell|>|<cell|>|<cell|<markup|)>>|<cell|>|<cell|>|<cell|<markup|\\uparrow><compound|markup|><compound|markup|><compound|markup|><compound|markup|><compound|markup|>>|<cell|>|<cell|>|<cell|<markup|\\Uparrow>>>|<row|<math|<tformat|<table|<row|<cell|<around*|[||\<nobracket\>>>>>>>|<cell|<key|]>>|<cell|>|<cell|<math|<around*|\<nobracket\>||]>>>|<cell|<key|]>>|<cell|>|<cell|<math|\<downarrow\>>>|<cell|<key|-
+  \<gtr\> Tab>>|<cell|>|<cell|<math|\<Downarrow\>>>|<cell|<key|= \<gtr\>
+  Tab>>>|<row|<cell|>|<cell|<markup|[>>|<cell|>|<cell|>|<cell|<markup|]>>|<cell|>|<cell|>|<cell|<markup|\\downarrow>>|<cell|>|<cell|>|<cell|<markup|\\Downarrow>>>|<row|<cell|<math|<around*|{||\<nobracket\>>>>|<cell|<key|{>>|<cell|>|<cell|<math|<around*|\<nobracket\>||}>>>|<cell|<key|}>>|<cell|>|<cell|<math|\<updownarrow\>>>|<cell|<key|\<less\>
+  - \<gtr\> Tab>>|<cell|>|<cell|<math|\<Updownarrow\>>>|<cell|<key|\<less\> =
+  \<gtr\> Tab>>>|<row|<cell|>|<cell|<markup|{>>|<cell|>|<cell|>|<cell|<markup|}>>|<cell|>|<cell|>|<cell|<markup|\\updownarrow>>|<cell|>|<cell|>|<cell|<markup|\\Updownarrow>>>|<row|<cell|<math|\<lfloor\>>>|<cell|<key|\|
+  .>>|<cell|>|<cell|<math|\<rfloor\>>>|<cell|<key|.
+  \|>>|<cell|>|<cell|<math|<around*|\<lceil\>||\<nobracket\>>>>|<cell|<key|\|
+  ‘>>|<cell|>|<math|\<rceil\>>|<cell|<key|‘
+  \|>>>|<row|<cell|>|<cell|<markup|\\lfloor>>|<cell|>|<cell|>|<cell|<markup|\\rfloor>>|<cell|>|<cell|>|<cell|<markup|\\lceil>>|<cell|>|<cell|>|<cell|<markup|\\rceil>>>|<row|<cell|<math|<around*|\<langle\>||\<nobracket\>>>>|<cell|<key|\<less\>
+  Shift+Tab>>|<cell|>|<cell|<math|\<rangle\>>>|<cell|<key|\<gtr\>
+  Shift+Tab>>|<cell|>|<cell|<math|/>>|<cell|<key|/>>|<cell|>|<cell|<math|\\>>|<cell|<key|\\
+  Tab>>>|<row|<cell|>|<cell|<markup|\\langle>>|<cell|>|<cell|>|<cell|<markup|\\rangle>>|<cell|>|<cell|>|<cell|<markup|/>>|<cell|>|<cell|>|<cell|<markup|\\backslash>>>|<row|<cell|<math|\|>>|<cell|<key|\|
+  Tab>>|<cell|>|<cell|<math|\<\|\|\>>>|<cell|<key|\| \|
+  Tab>>|<cell|>|<cell|>|<cell|>|<cell|>|<cell|>|<cell|>>|<row|<cell|>|<cell|>|<cell|>|<cell|>|<cell|<markup|\\\|>>|<cell|>|<cell|>|<cell|>|<cell|>|<cell|>|<cell|>>>><tabular|<tformat|<table|<row|<cell|>>>>>>
+    Delimiters
   </big-table>
 
   <\big-table|<tabular|<tformat|<cwith|4|4|6|6|cell-halign|c>|<table|<row|<cell|>|<cell|>|<cell|>|<cell|>|<cell|>|<cell|>|<cell|>|<cell|>|<cell|>|<cell|>|<cell|>|<cell|>>|<row|<cell|>|<cell|>|<cell|>|<cell|>|<cell|>|<cell|>|<cell|>|<cell|>|<cell|>|<cell|>|<cell|>|<cell|>>|<row|<cell|<math|<around*|\|||\<nobracket\>>>>|<cell|>|<cell|>|<cell|<math|<around*|\|||\|>>>|<cell|>|<cell|>|<cell|>|<cell|>|<cell|>|<cell|>|<cell|>|<cell|>>|<row|<cell|>|<cell|<todo|<markup|\\arrowvert>>>|<cell|>|<cell|>|<cell|<todo|<markup|\\Arrowvert>>>|<cell|>|<cell|>|<cell|>|<cell|>|<cell|>|<cell|>|<cell|>>>>>>
@@ -301,8 +316,16 @@
     Math Mode accents
   </big-table>
 
-  <\big-table|<tabular|<tformat|<table|<row|<cell|>>>>>>
-    \;
+  <\big-table|<tabular|<tformat|<cwith|1|-1|1|-1|cell-valign|c>|<table|<row|<cell|<math|<wide|abc|~>>>|<cell|<key|Alt+~>>|<cell|>|<cell|<math|<wide|abc|^>>>|<cell|<key|Alt+^>>|<cell|>|<cell|<math|<wide|abc|\<wide-varleftarrow\>>>>|<cell|<key|Alt+O
+  \<less\>>>|<cell|>|<cell|<math|<wide|abc|\<wide-varrightarrow\>>>>|<cell|<key|Alt+O
+  \<gtr\>>>>|<row|<cell|>|<cell|<markup|\\widetilde>>|<cell|>|<cell|>|<cell|<markup|\\widehat>>|<cell|>|<cell|>|<cell|<todo|<markup|\\overleftarrow>><compound|markup|>>|<cell|>|<cell|>|<cell|<todo|<markup|\\overrightarrow>>>>|<row|<cell|<math|<wide|abc|\<wide-bar\>>>>|<cell|<key|Alt+O
+  ->>|<cell|>|<cell|<math|<underline|abc>>>|<cell|<key|Alt+U
+  ->>|<cell|>|<cell|<math|<wide|abc|\<wide-overbrace\>>>>|<cell|<key|Alt+O
+  {>>|<cell|>|<cell|<math|<wide*|abc|\<wide-underbrace\>>>>|<cell|<key|Alt+U
+  }>>>|<row|<cell|>|<cell|<markup|\\overline>>|<cell|>|<cell|>|<cell|<markup|\\underline>>|<cell|>|<cell|>|<cell|<markup|\\overbrace>>|<cell|>|<cell|>|<cell|<markup|\\underbrace>>>|<row|<cell|<math|<sqrt|abc>>>|<cell|<key|Alt+S>>|<cell|>|<cell|<math|<sqrt|abc|n>>>|<cell|<key|Alt+S
+  Tab>>|<cell|>|<cell|<math|f<rprime|'>>>|<cell|<key|f
+  '>>|<cell|>|<cell|<math|<frac|abc|xyz>>>|<cell|<key|Alt+F>>>|<row|<cell|>|<cell|<markup|\\sqrt>>|<cell|>|<cell|>||<cell|>|<cell|>|<cell|<markup|f'>>|<cell|>|<cell|>|<cell|<markup|\\frac>>>>>><tabular|<tformat|<table|<row|<cell|>>>>>>
+    Some other constructions
   </big-table>
 
   <\big-table|<tabular|<tformat|<table|<row|<cell|<math|\<ulcorner\>>>|<cell|>|<cell|>|<cell|<math|\<urcorner\>>>|<cell|>|<cell|>|<cell|<math|\<llcorner\>>>|<cell|>|<cell|>|<cell|<math|\<lrcorner\>>>|<cell|>|<cell|>>|<row|<cell|>|<cell|<markup|\\ulcorner>>|<cell|>|<cell|>|<cell|<markup|\\urcorner>>|<cell|>|<cell|>|<cell|<markup|\\llcorner>>|<cell|>|<cell|>|<cell|<markup|\\lrcorner>>|<cell|>>>>>>