diff --git a/journal/Task-by-task.md b/journal/Task-by-task.md
index 1cb7b2028c8737759c9ccca6018fb5e0daca6f31..1339a164b8bff978aca18bcc9de34a695403b92f 100644
--- a/journal/Task-by-task.md
+++ b/journal/Task-by-task.md
@@ -5,3 +5,35 @@ here I am at the end of the first module, I can only be satisfied. The course is
 
 As a new PhD student, I wanted to do som courses to submit for my ED, and this MOOC is one of my best choises. I always wnted to **effectively** use Github and GitLab, and here, I got inspired with huge energy & motivation. I already created a webpage using Github pages, and started reviewing some projects of interest for eventual collaboration.
 
+
+quote : "
+
+La remise en cose fait partie du processus scientifique. Il est dpnc pas surprenant que de telles difficultés de reproduction de travaux scientifiques soient présente!! cependant, deux autres caractéristiques essentielle de la production scientifique sont la rigeur et la transparence. (dans plusieurs cas, il manquait souvent l'un ou l'autre !! :( )
+
+"
+
+
+Cette expression $\sum_{i=1}^n X_i$ est inlinée.
+
+\begin{equation}
+
+\$sum_{i=1}^n X_i\$
+
+$ \sum_{\forall i}{x_i^{2}} $
+
+$$x_{1,2} = \frac{ -b \pm \sqrt{b^2-4ac}}{2b}.$$
+
+
+
+\end{equation}
+
+
+
+
+
+<script type="text/javascript" async
+src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.2/MathJax.js? 
+config=TeX-MML-AM_CHTML"
+</script>
+
+$$x_{1,2} = \frac{ -b \pm \sqrt{b^2-4ac}}{2b}.$$