diff --git a/main.ipynb b/main.ipynb
index 246605c..9d347d5 100644
--- a/main.ipynb
+++ b/main.ipynb
@@ -14,7 +14,6 @@
    "cell_type": "markdown",
    "id": "b3969792-c3ea-490b-8f5a-463da33ce0c4",
    "metadata": {
-    "jp-MarkdownHeadingCollapsed": true,
     "tags": []
    },
    "source": [
@@ -38,9 +37,9 @@
     "        * https://docs.python.org/3/reference/datamodel.html the most important part from that reference\n",
     "* https://peps.python.org/\n",
     "    * https://peps.python.org/pep-0008/ python style guide\n",
-    "    * https://peps.python.org/pep-0020 the zen of python\n",
-    "    * https://peps.python.org/pep-0257 docstrings\n",
-    "    * ~~https://peps.python.org/pep-0333 please no~~\n",
+    "    * https://peps.python.org/pep-0020/ the zen of python\n",
+    "    * https://peps.python.org/pep-0257/ docstrings\n",
+    "    * ~~https://peps.python.org/pep-0333/ please no~~\n",
     "* https://wiki.python.org/moin/FrontPage at the moment of writing, haven't read much of it"
    ]
   },
@@ -81,7 +80,6 @@
    "cell_type": "markdown",
    "id": "07390193-fdde-4bee-aec4-f5b3227dea06",
    "metadata": {
-    "jp-MarkdownHeadingCollapsed": true,
     "tags": []
    },
    "source": [
@@ -120,7 +118,6 @@
    "cell_type": "markdown",
    "id": "de9d52c9-6df3-4427-b316-587b56347cd4",
    "metadata": {
-    "jp-MarkdownHeadingCollapsed": true,
     "tags": []
    },
    "source": [
@@ -143,7 +140,6 @@
    "cell_type": "markdown",
    "id": "ccde8fee-3003-4842-bec8-8f118e95b17e",
    "metadata": {
-    "jp-MarkdownHeadingCollapsed": true,
     "tags": []
    },
    "source": [
@@ -170,7 +166,6 @@
    "cell_type": "markdown",
    "id": "36c05f51-5422-41c7-a461-7f766c04b088",
    "metadata": {
-    "jp-MarkdownHeadingCollapsed": true,
     "tags": []
    },
    "source": [
@@ -395,7 +390,6 @@
    "cell_type": "markdown",
    "id": "6519c846-90fd-4828-9861-3cac9954880f",
    "metadata": {
-    "jp-MarkdownHeadingCollapsed": true,
     "tags": []
    },
    "source": [