diff --git a/unpacked/jax/input/TeX/jax.js b/unpacked/jax/input/TeX/jax.js
index 3302acc33..6794679c4 100644
--- a/unpacked/jax/input/TeX/jax.js
+++ b/unpacked/jax/input/TeX/jax.js
@@ -335,9 +335,11 @@
     }
   });
   STACKITEM.not.remap = {
+    0x2190:0x219A, 0x2192:0x219B, 0x2194:0x21AE,
+    0x21D0:0x21CD, 0x21D2:0x21CF, 0x21D4:0x21CE,
     0x2208:0x2209, 0x220B:0x220C, 0x2223:0x2224, 0x2225:0x2226,
     0x223C:0x2241, 0x007E:0x2241, 0x2243:0x2244, 0x2245:0x2247,
-    0x2248:0x2249, 0x003D:0x2260, 0x2261:0x2262,
+    0x2248:0x2249, 0x224D:0x226D, 0x003D:0x2260, 0x2261:0x2262,
     0x003C:0x226E, 0x003E:0x226F, 0x2264:0x2270, 0x2265:0x2271,
     0x2272:0x2274, 0x2273:0x2275, 0x2276:0x2278, 0x2277:0x2279,
     0x227A:0x2280, 0x227B:0x2281, 0x2282:0x2284, 0x2283:0x2285,
@@ -1986,7 +1988,7 @@
       this.prefilterHooks.Execute(data); math = data.math;
       try {
         mml = TEX.Parse(math).mml();
-//        mml = MML.semantics(mml,MML.annotation(math).With({encoding:"application:x-tex"}));
+//        mml = MML.semantics(mml,MML.annotation(math).With({encoding:"application/x-tex"}));
       } catch(err) {
         if (!err.texError) {throw err}
         mml = this.formatError(err,math,display,script);
diff --git a/unpacked/jax/output/HTML-CSS/fonts/TeX/fontdata.js b/unpacked/jax/output/HTML-CSS/fonts/TeX/fontdata.js
index 150de76bd..885d1bc29 100644
--- a/unpacked/jax/output/HTML-CSS/fonts/TeX/fontdata.js
+++ b/unpacked/jax/output/HTML-CSS/fonts/TeX/fontdata.js
@@ -77,6 +77,8 @@
                    remap: {0x391:0x41, 0x392:0x42, 0x395:0x45, 0x396:0x5A, 0x397:0x48,
                            0x399:0x49, 0x39A:0x4B, 0x39C:0x4D, 0x39D:0x4E, 0x39F:0x4F,
                            0x3A1:0x50, 0x3A4:0x54, 0x3A7:0x58, 0x29F8:[0x002F,"bold-italic"],
+                           0x219A:"\u2190\u0338", 0x219B:"\u2192\u0338", 0x21AE:"\u2194\u0338",
+                           0x21CD:"\u21D0\u0338", 0x21CE:"\u21D4\u0338", 0x21CF:"\u21D2\u0338",
                            0x2204:"\u2203\u0338", 0x2224:"\u2223\u0338", 0x2226:"\u2225\u0338",
                            0x2241:"\u223C\u0338", 0x2247:"\u2245\u0338", 
                            0x226E:"<\u0338", 0x226F:">\u0338",
@@ -186,9 +188,10 @@
         //  
         0x2204: "\u2203\u0338",    // \not\exists
         0x220C: "\u220B\u0338",    // \not\ni
-        0x2244: "\u2243\u0338",    // \not\cong
+        0x2244: "\u2243\u0338",    // \not\simeq
         0x2249: "\u2248\u0338",    // \not\approx
         0x2262: "\u2261\u0338",    // \not\equiv
+        0x226D: "\u224D\u0338",    // \not\asymp
         0x2274: "\u2272\u0338",    // \not\lesssim
         0x2275: "\u2273\u0338",    // \not\gtrsim
         0x2278: "\u2276\u0338",    // \not\lessgtr