Update textbook.fr.md

00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/20.n2/12.en/textbook.fr.md

@@ -3,6 +3,9 @@ title: Brainstorming on the mathematical tools required at each level
 published: true
 routable: true
 visible: false
+---
+
+<!---------------------------------
 lessons:
     - slug: define-g12-mathematical-tools
       order: 3
@@ -10,7 +13,8 @@ lessons:
       order: 1
     - slug: define-2-mathematical-tools-polyglot
       order: 3
----
+----------------------------------->
+
 
 #### Define the mathematical tools required at level 2