diff --git a/module3.ipynb b/module3.ipynb
index 709d82c..24b3064 100644
--- a/module3.ipynb
+++ b/module3.ipynb
@@ -1,5 +1,51 @@
 {
  "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Regular Expressions"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Basic Matching"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 8,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "<re.Match object; span=(2, 5), match='aza'>\n",
+      "<re.Match object; span=(1, 4), match='aza'>\n",
+      "None\n",
+      "<re.Match object; span=(0, 1), match='x'>\n",
+      "<re.Match object; span=(4, 8), match='ping'>\n",
+      "<re.Match object; span=(1, 5), match='pong'>\n",
+      "<re.Match object; span=(0, 4), match='Pang'>\n"
+     ]
+    }
+   ],
+   "source": [
+    "import re\n",
+    "result1 = re.search(r\"aza\", \"plaza\")\n",
+    "result2 = re.search(r\"aza\", \"bazaar\")\n",
+    "print(result1)\n",
+    "print(result2)\n",
+    "print(re.search(r\"aza\", \"maze\"))\n",
+    "print(re.search(r\"^x\", \"xenon\"))\n",
+    "print(re.search(r\"p.ng\", \"clapping\"))\n",
+    "print(re.search(r\"p.ng\", \"sponge\"))\n",
+    "print(re.search(r\"p.ng\", \"Pangaea\", re.IGNORECASE))"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": null,
@@ -9,8 +55,22 @@
   }
  ],
  "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
   "language_info": {
-   "name": "python"
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.12.3"
   }
  },
  "nbformat": 4,