--- loncom/homework/lonmaxima.pm	2006/12/19 17:44:16	1.12
+++ loncom/homework/lonmaxima.pm	2007/05/26 15:51:08	1.14
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Interface routines to MAXIMA CAS
 #
-# $Id: lonmaxima.pm,v 1.12 2006/12/19 17:44:16 www Exp $
+# $Id: lonmaxima.pm,v 1.14 2007/05/26 15:51:08 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -75,7 +75,8 @@ sub runscript {
 	if ($line=~/\w/) { $reply=&maximareply($socket,$line.";\n"); }
 	if ($reply=~/^Error\:/) { return $reply; }
     }
-    $reply=~s/\W//gs;
+    $reply=~s/^\s*//gs;
+    $reply=~s/\s*$//gs;
     return $reply;
 }
 
@@ -101,8 +102,8 @@ sub maxima_run {
     }
     my $reply=&runscript($socket,$script);
     &disconnect($socket);
-    if ($reply=~/^\s*true\s*$/) { return 'EXACT_ANS'; }
-    if ($reply=~/^\s*false\s*/) { return 'INCORRECT'; } 
+    if ($reply=~/^\s*true\s*$/i) { return 'EXACT_ANS'; }
+    if ($reply=~/^\s*false\s*$/i) { return 'INCORRECT'; } 
     return 'BAD_FORMULA';
 }