diff --git a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/40.n4/10.brainstorming/01.p1/textbook.es.md b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/40.n4/10.brainstorming/01.p1/textbook.es.md
index 455bd45f3..f55d68c5b 100644
--- a/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/40.n4/10.brainstorming/01.p1/textbook.es.md
+++ b/00.brainstorming-pedagogical-teams/45.synthesis-structuring/10.math-tools/40.n4/10.brainstorming/01.p1/textbook.es.md
@@ -132,6 +132,7 @@ RESPONDER / COMENTAR :
 <!------------------------------------------------------------------------------
 ECUACIONES DIFERENCIALES 
 ------------------------------------------------------------------------------->
+! *Ecuaciones diferenciales*
 
 
 
@@ -149,6 +150,7 @@ RESPONDER / COMENTAR :
 <!------------------------------------------------------------------------------
 AUTRES
 ------------------------------------------------------------------------------->
+! *Otros*
 
 (XXX-YY)
 ...