--- a/parser2a.scala	Wed Nov 14 08:46:00 2012 +0000
+++ b/parser2a.scala	Mon Nov 19 14:18:42 2012 +0000
@@ -94,7 +94,7 @@
   }
 }
 
-lazy val E: Parser[Int] = (T ~ T_OP("+") ~ E) ==> { case ((x, y), z) => x + z } || T  // start symbol
+lazy val E: Parser[Int] = (T ~ T_OP("+") ~ E) ==> { case ((x, y), z) => x + z } || T  
 lazy val T: Parser[Int] = (F ~ T_OP("*") ~ T) ==> { case ((x, y), z) => x * z } || F
 lazy val F: Parser[Int] = (T_LPAREN ~> E <~ T_RPAREN) || NumParser