diff --git a/recursion_dynamic/n_pairs_parentheses/n_pairs_parentheses_solution.ipynb b/recursion_dynamic/n_pairs_parentheses/n_pairs_parentheses_solution.ipynb
index e2296f1..bb07d9d 100644
--- a/recursion_dynamic/n_pairs_parentheses/n_pairs_parentheses_solution.ipynb
+++ b/recursion_dynamic/n_pairs_parentheses/n_pairs_parentheses_solution.ipynb
@@ -18,7 +18,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## Problem: Print all valid combinations of n-pairs of parentheses\n",
+    "## Problem: Print all valid combinations of n-pairs of parentheses.\n",
     "\n",
     "* [Constraints](#Constraints)\n",
     "* [Test Cases](#Test-Cases)\n",
@@ -104,7 +104,7 @@
     "    if n == 0:\n",
     "        return result_set\n",
     "    parentheses_util(n, n, '', result_set)\n",
-    "    return result_set\n"
+    "    return result_set"
    ]
   },
   {
@@ -125,30 +125,57 @@
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "Success: test_pair_parentheses\n"
+      "Overwriting test_n_pairs_parentheses.py\n"
      ]
     }
    ],
    "source": [
-    "# %load test_n_pairs_parentheses.py\n",
+    "%%writefile test_n_pairs_parentheses.py\n",
     "from nose.tools import assert_equal\n",
     "\n",
+    "\n",
     "class TestPairParentheses(object):\n",
-    "    \n",
+    "\n",
     "    def test_pair_parentheses(self, solution):\n",
     "        assert_equal(solution(0), set([]))\n",
     "        assert_equal(solution(1), set(['()']))\n",
-    "        assert_equal(solution(2), set(['(())', '()()']))\n",
-    "        assert_equal(solution(3), set(['((()))','(()())', '(())()', '()(())', '()()()']))\n",
+    "        assert_equal(solution(2), set(['(())', \n",
+    "                                       '()()']))\n",
+    "        assert_equal(solution(3), set(['((()))', \n",
+    "                                       '(()())', \n",
+    "                                       '(())()', \n",
+    "                                       '()(())', \n",
+    "                                       '()()()']))\n",
     "        print('Success: test_pair_parentheses')\n",
     "\n",
+    "\n",
     "def main():\n",
     "    test = TestPairParentheses()\n",
     "    test.test_pair_parentheses(pair_parentheses)\n",
     "\n",
+    "\n",
     "if __name__ == '__main__':\n",
     "    main()"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Success: test_pair_parentheses\n"
+     ]
+    }
+   ],
+   "source": [
+    "%run -i test_n_pairs_parentheses.py"
+   ]
   }
  ],
  "metadata": {
@@ -167,7 +194,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython2",
-   "version": "2.7.9"
+   "version": "2.7.10"
   }
  },
  "nbformat": 4,
diff --git a/recursion_dynamic/n_pairs_parentheses/test_n_pairs_parentheses.py b/recursion_dynamic/n_pairs_parentheses/test_n_pairs_parentheses.py
index 52d19d7..1b735e8 100644
--- a/recursion_dynamic/n_pairs_parentheses/test_n_pairs_parentheses.py
+++ b/recursion_dynamic/n_pairs_parentheses/test_n_pairs_parentheses.py
@@ -1,17 +1,25 @@
 from nose.tools import assert_equal
 
+
 class TestPairParentheses(object):
-    
+
     def test_pair_parentheses(self, solution):
         assert_equal(solution(0), set([]))
         assert_equal(solution(1), set(['()']))
-        assert_equal(solution(2), set(['(())', '()()']))
-        assert_equal(solution(3), set(['((()))','(()())', '(())()', '()(())', '()()()']))
+        assert_equal(solution(2), set(['(())', 
+                                       '()()']))
+        assert_equal(solution(3), set(['((()))', 
+                                       '(()())', 
+                                       '(())()', 
+                                       '()(())', 
+                                       '()()()']))
         print('Success: test_pair_parentheses')
 
+
 def main():
     test = TestPairParentheses()
     test.test_pair_parentheses(pair_parentheses)
 
+
 if __name__ == '__main__':
     main()
\ No newline at end of file