[Question 3] Use @ symble

Question 3.ipynb

@@ -81,7 +81,7 @@
     "                         [0,                 0,                1]], dtype=np.float64)\n",
     "\n",
     "    # Combine the translation and rotation into a single transformation matrix\n",
-    "    rotation_matrix = np.dot(np.dot(translation_back, rotation), translation_to_origin)\n",
+    "    rotation_matrix = translation_back @ rotation @ translation_to_origin\n",
     "    \n",
     "    return rotation_matrix"
    ]
@@ -179,7 +179,7 @@
    "id": "06417b95",
    "metadata": {},
    "source": [
-    "This is one common mistake."
+    "This is one common **mistake**."
    ]
   },
   {