diff --git a/src/map.ts b/src/map.ts
index 0677455..e5ff222 100644
--- a/src/map.ts
+++ b/src/map.ts
@@ -292,4 +292,9 @@ export const symbolMap = new Map<string, string>([
     ['xi', 'xi'], 
     ['yen', 'yen'], 
     ['zeta', 'zeta'], 
+
+    // extended
+    ['mathscr', 'scr'],
+    ['LaTeX', '#LaTeX'],
+    ['TeX', '#TeX'],
 ]);
diff --git a/src/parser.ts b/src/parser.ts
index cdde996..1039844 100644
--- a/src/parser.ts
+++ b/src/parser.ts
@@ -254,6 +254,8 @@ export function parseTex(tex: string, customTexMacros: {[key: string]: string}):
         '\\vdots': '\\operatorname{SyMb01-vdots}',
         '\\notin': '\\operatorname{SyMb01-notin}',
         '\\slash': '\\operatorname{SyMb01-slash}',
+        '\\LaTeX': '\\operatorname{SyMb01-LaTeX}',
+        '\\TeX': '\\operatorname{SyMb01-TeX}',
         ...customTexMacros
     };
     const options = {
diff --git a/test/symbol.yml b/test/symbol.yml
index b76214f..3e971a9 100644
--- a/test/symbol.yml
+++ b/test/symbol.yml
@@ -28,10 +28,6 @@ cases:
   - title: mathcal
     tex: \mathcal{A} \mathcal{B} \mathcal{C} \mathcal{D} \mathcal{E} \mathcal{F} \mathcal{G} \mathcal{H} \mathcal{I} \mathcal{J} \mathcal{K} \mathcal{L} \mathcal{M} \mathcal{N} \mathcal{O} \mathcal{P} \mathcal{Q} \mathcal{R} \mathcal{S} \mathcal{T} \mathcal{U} \mathcal{V} \mathcal{W} \mathcal{X} \mathcal{Y} \mathcal{Z}
     typst: cal(A) cal(B) cal(C) cal(D) cal(E) cal(F) cal(G) cal(H) cal(I) cal(J) cal(K) cal(L) cal(M) cal(N) cal(O) cal(P) cal(Q) cal(R) cal(S) cal(T) cal(U) cal(V) cal(W) cal(X) cal(Y) cal(Z)
-  - title: mathscr
-    tex: \mathscr{A} \mathscr{B} \mathscr{C} \mathscr{D} \mathscr{E} \mathscr{F} \mathscr{G} \mathscr{H} \mathscr{I} \mathscr{J} \mathscr{K} \mathscr{L} \mathscr{M} \mathscr{N} \mathscr{O} \mathscr{P} \mathscr{Q} \mathscr{R} \mathscr{S} \mathscr{T} \mathscr{U} \mathscr{V} \mathscr{W} \mathscr{X} \mathscr{Y} \mathscr{Z}
-    # This result it not proper. Try to make it better
-    typst: cal(A) cal(B) cal(C) cal(D) cal(E) cal(F) cal(G) cal(H) cal(I) cal(J) cal(K) cal(L) cal(M) cal(N) cal(O) cal(P) cal(Q) cal(R) cal(S) cal(T) cal(U) cal(V) cal(W) cal(X) cal(Y) cal(Z)
   - title: mathrm
     tex: \mathrm{a} \rm{a}
     typst: upright(a) upright(a)
@@ -110,4 +106,7 @@ cases:
   - title: non-strict mode
     tex: \myop
     typst: myop
-    nonStrict: true
\ No newline at end of file
+    nonStrict: true
+  - title: extended
+    tex: \mathscr{A} \LaTeX \TeX
+    typst: "scr(A) #LaTeX #TeX"
\ No newline at end of file