--- loncom/homework/lonmaxima.pm	2008/06/14 16:34:54	1.23
+++ loncom/homework/lonmaxima.pm	2008/08/21 11:11:31	1.24
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Interface routines to MAXIMA CAS
 #
-# $Id: lonmaxima.pm,v 1.23 2008/06/14 16:34:54 www Exp $
+# $Id: lonmaxima.pm,v 1.24 2008/08/21 11:11:31 bisitz Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -64,7 +64,7 @@ sub blacklisted {
 			   'file','batch','stringout','translat','stout',
 			   'stin','block','system','concat','read','inchar',
 			   'outchar','ttyoff','with_stdout','writefile',
-			   'reset') {
+			   'reset','quit','\? ','\?','display2d','%i','%o','describe') {
 	if ($cmd=~/$forbidden/s) { return 1; }
     } 
     return 0;