--- loncom/homework/default_homework.lcpm	2006/12/15 22:11:43	1.123
+++ loncom/homework/default_homework.lcpm	2006/12/19 14:24:05	1.124
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA 
 # used by lonxml::xmlparse() as input variable $safeinit to Apache::run::run()
 #
-# $Id: default_homework.lcpm,v 1.123 2006/12/15 22:11:43 www Exp $
+# $Id: default_homework.lcpm,v 1.124 2006/12/19 14:24:05 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -417,6 +417,15 @@ sub caparesponse_check_list {
     return ($final_award,$final_msg);
 }
 
+sub cas {
+    my ($system,$input)=@_;
+    my $output;
+    if ($system eq 'maxima') {
+       $output=&maxima_eval($input);
+    }
+    return $output;
+}
+
 sub tex {
     if ( $external::target eq "tex" ) {
 	return $_[0];