diff --git a/syntax/quox.xml b/syntax/quox.xml
index 5f06be5..01f1f7c 100644
--- a/syntax/quox.xml
+++ b/syntax/quox.xml
@@ -1,9 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE language SYSTEM "language.dtd" [
-  <!ENTITY tok_start "(?&lt;=^|\s|[(\[{}\]),:.])">
-  <!ENTITY tok_end   "(?=$|\s|[(\[{}\]),:.])">
-  <!ENTITY hexit     "[0-9a-fA-F]">
-]>
+<!DOCTYPE language SYSTEM "language.dtd" [ <!ENTITY hexit "[0-9a-fA-F]"> ]>
 
 <language name="quox" section="Sources" extensions="*.quox"
           version="1" kateversion="5.53">
@@ -23,9 +19,9 @@
       <item>coe</item> <item>comp</item>
       <item>λ</item> <item>fun</item>
       <item>δ</item> <item>dfun</item>
-      <item>return</item> <item>of</item>
-      <item>return</item> <item>of</item>
+      <item>case</item> <item>return</item> <item>of</item>
       <item>zero</item> <item>succ</item>
+      <item>let</item> <item>in</item>
     </list>
 
     <list name="attrs">
@@ -58,7 +54,7 @@
         <Detect2Chars attribute="exprs" context="#stay" char="=" char1=">" />
 
         <RegExpr attribute="exprs" context="qty_suffix"
-          String="\bcase(?=([01#]|ω)?\b)" />
+          String="\b(case|let)(?=([01#]|ω)?\b)" />
 
         <RegExpr attribute="hex_nat" context="#stay"
           String="\b0[xX]&hexit;((&hexit;|_)*&hexit;)?\b(?!\.)" />
@@ -74,7 +70,7 @@
           String="(?&lt;!\w|-|')'(\w|-|')+" />
 
         <RegExpr attribute="qty" context="#stay"
-          String="\b([01#]|ω)\.(?!\d)" />
+          String="(\b[01]|#|ω)\.(?!\d)" />
 
         <DetectChar attribute="punc" context="#stay" char="=" />
         <DetectChar attribute="punc" context="#stay" char="@" />
@@ -85,6 +81,9 @@
           char="-" char1="-" />
         <Detect2Chars attribute="comment" context="comment_m"
           char="{" char1="-" />
+
+        <RegExpr attribute="displace" context="#stay"
+          String="[⁰¹²³⁴⁵⁶⁷⁸⁹]|\^\d+" />
       </context>
 
       <context attribute="qty" lineEndContext="#pop" name="qty_suffix">
@@ -155,6 +154,7 @@
       <itemData name="tag_esc" defStyleNum="dsSpecialChar" />
       <itemData name="qty" defStyleNum="dsBuiltIn" />
       <itemData name="punc" defStyleNum="dsNormal" />
+      <itemData name="displace" defStyleNum="dsBuiltIn" />
       <itemData name="attr" defStyleNum="dsNormal" />
       <itemData name="attr_name" defStyleNum="dsAttribute" />
       <itemData name="comment" defStyleNum="dsComment" />