diff --git a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/40.n4/textbook.fr.md b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/40.n4/textbook.fr.md
index 71c11ae25..12ab3f9f6 100644
--- a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/40.n4/textbook.fr.md
+++ b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/40.n4/textbook.fr.md
@@ -4,20 +4,10 @@ published: true
 routable: true
 visible: false
 lessons:
-    - slug: definir-234-outil-mathematique
+    - slug: define-234-mathematical-tools
       order: 3
-    - slug: define-4-mathematical-tools-polyglot
-      order: 1
-    - slug: define-4-mathematical-tools-polyglot
-      order: 1
 ---
 
-<!----------------------------------------------
-lessons:
-    - slug: brainstorming-234-mathematical-tools
-      order: 3
------------------------------------------------>
-
 
 #### Définir les outils mathématiques requis au niveau 4