--- loncom/homework/default_homework.lcpm	2004/10/05 20:18:29	1.88
+++ loncom/homework/default_homework.lcpm	2004/10/11 16:31:34	1.90
@@ -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 1.88 2004/10/05 20:18:29 albertel Exp $
+# $Id: default_homework.lcpm,v 1.90 2004/10/11 16:31:34 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -70,7 +70,6 @@ sub caparesponse_check {
 	$response=~s/ +/ /g;
     }
     if ($type eq 'float') { $response=~s/,//g; }
-    &LONCAPA_INTERNAL_DEBUG("fmt $ans_fmt, res is $response");
     if ($type eq 'float' && $ans_fmt=~/\$/) {
 	if ($response!~/^\$/)  { return "NO_UNIT: Missing \$ "; }
 	$response=~s/\$//g;
@@ -515,8 +514,8 @@ sub chemparse {
 	    }
 	    next;
 	}
-	$token =~ /^\s*(\d*)(.*)/;
-	$formula .= $1 if ($1 > 1);  # stoichiometric coefficient
+	$token =~ /^\s*(\d*(?:&frac\d\d)?)(.*)/;
+        $formula .= $1 if ($1 ne '1');  # stoichiometric coefficient
 	
 	my $molecule = $2;
 	# subscripts
@@ -537,7 +536,6 @@ sub chemparse {
 
 sub prettyprint {
     my ($value,$fmt,$target)=@_;
-    &LONCAPA_INTERNAL_DEBUG("format -$fmt-");
     my $result;
     if (!$target) { $target = $external::target; }
     if ($fmt =~ /chem/i) { return(&chemparse($value)); }