diff --git a/10.brainstorming-innovative-courses/intercambio-curso-electromagnetismo/textbook.en.md b/10.brainstorming-innovative-courses/intercambio-curso-electromagnetismo/textbook.en.md
index 8f59c0f6b..9139e3dc0 100644
--- a/10.brainstorming-innovative-courses/intercambio-curso-electromagnetismo/textbook.en.md
+++ b/10.brainstorming-innovative-courses/intercambio-curso-electromagnetismo/textbook.en.md
@@ -700,7 +700,7 @@ $`\displaystyle\iint_S \overrightarrow{rot}\,\overrightarrow{E}\cdot dS = -\disp
 
 Mecánica newtoniana : espacio y el tiempo son desacoplados $ \ Longrightarrow` $ orden de integración / derivación entre variables de espacio y tiempo no importa.
 
-$`\displaystyle\iint_S \overrightarrow{rot}\,\overrightarrow{E}\cdot dS = - \dfrac{\partial}{\partial t} \left( \displaystyle\iint_S \overrightarrow{B}\cdot dS`$
+$`\displaystyle\iint_S \overrightarrow{rot}\,\overrightarrow{E}\cdot dS = - \dfrac{\partial}{\partial t} \left( \displaystyle\iint_S \overrightarrow{B}\cdot dS\right)`$
 
 Ostrogradsky’s theorem : for all vectorial field $`\vec{X}`$,