diff --git a/module2/exo1/toy_notebook_en.ipynb b/module2/exo1/toy_notebook_en.ipynb
index d7e16fd9ccc3d7adb1236c92975e6b476a41545c..3d4081ecfc64521e5615eea933c57fb12ed0367b 100644
--- a/module2/exo1/toy_notebook_en.ipynb
+++ b/module2/exo1/toy_notebook_en.ipynb
@@ -4,8 +4,8 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "# On the computation of $\\pi$ #\n",
-    "## Asking the maths library ##\n",
+    "# On the computation of $\\pi$ \n",
+    "## Asking the maths library\n",
     "My computer tells me that $\\pi$ is *approximatively*"
    ]
   },
@@ -32,7 +32,7 @@
    "metadata": {},
    "source": [
     "## Buffon's needle ##\n",
-    "Applying the method of [Buffon's needle](https://en.wikipedia.org/wiki/Buffon%27s_needle_problem), we get the **approximation**"
+    "Applying the method of [Buffon's needle](https://en.wikipedia.org/wiki/Buffon%27s_needle_problem), we get the _approximation_"
    ]
   },
   {