Update textbook.fr.md

00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/05.first-steps/30.en/textbook.fr.md

@@ -3,12 +3,15 @@ title: Brainstorming sur les outils mathématiques requis à chaque niveau
 published: true
 routable: true
 visible: false
+---
+
+<!---------------------------------
 lessons:
     - slug: define-g12-mathematical-tools
       order: 1
     - slug: define-g-mathematical-tools-polyglot
       order: 3
----
+----------------------------------->
 
 #### Define the mathematical tools required at each level