gistfile1.diff

diff --git a/truthy/__main__.py b/truthy/__main__.py
index de3c8d1..f7264b4 100644
--- a/truthy/__main__.py
+++ b/truthy/__main__.py
@@ -67,7 +67,10 @@ def generate_BinaryExpr(symbol_str, operator_f):
             col = [symbol_str]
             for assignment in assignments:
                 col.append(self.evaluate(assignment))
-            return self.expr1.get_table(assignments) + [col] + self.expr2.get_table(assignments)
+            res = self.expr1.get_table(assignments) + [col] + self.expr2.get_table(assignments)
+            res[0][0] = '(' + res[0][0]
+            res[-1][0] += ')'
+            return res
 
     return AbstractBinaryExpr