diff --git a/array_combination.ipynb b/array_combination.ipynb
index 6f2d4c0..6fe891f 100644
--- a/array_combination.ipynb
+++ b/array_combination.ipynb
@@ -16,15 +16,6 @@
      "outputs": [],
      "prompt_number": 112
     },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": "def get_nonrepeated(seta, setb):\n    for i in seta:\n        if i not in setb:\n            yield i",
-     "language": "python",
-     "metadata": {},
-     "outputs": [],
-     "prompt_number": 9
-    },
     {
      "cell_type": "code",
      "collapsed": false,
@@ -38,24 +29,7 @@
        "text": "[[4, 3], [3, 7], [4, 7]]\n3\n"
       }
      ],
-     "prompt_number": 115
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": "",
-     "language": "python",
-     "metadata": {},
-     "outputs": [],
-     "prompt_number": 56
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": "",
-     "language": "python",
-     "metadata": {},
-     "outputs": []
+     "prompt_number": 116
     }
    ],
    "metadata": {}