diff --git a/pymath/calculus/explicable.py b/pymath/calculus/explicable.py
index 6b21569..de209ef 100644
--- a/pymath/calculus/explicable.py
+++ b/pymath/calculus/explicable.py
@@ -47,11 +47,15 @@ class Explicable(Renderable):
 
         """
         if self.explained:
-            return [self.STR_RENDER(self.postfix_tokens)]
+            return self.self_generator()
         else:
             self.explained = 1
             return self.history_generator()
 
+    def self_generator(self):
+        """ Generator which yield itself rendered """
+        yield self.STR_RENDER(self.postfix_tokens)
+
     def history_generator(self):
         r""" Generator for rendered steps which leed to itself