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+# Essais venant du MOOC
+
+## Si je veux écrire des maths
+
+This math is inline $`a^2+b^2=c^2`$.
+
+This is on a separate line
+
+```math
+a^2+b^2=c^2
+```
+
+```math
+\frac{4z^3}{16}
+```
+
+Cette expression $`\sum_{i=1}^n X_i`$ est inlinée.
+
+
+```math
+\frac{1}{n} \sum_{i=1}^n X_i
+```
+
+1. des fractions: $`\frac{4z^3}{16}`$
+2. 
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