--- loncom/homework/default_homework.lcpm	2006/06/30 21:24:27	1.108
+++ loncom/homework/default_homework.lcpm	2006/07/28 15:22:28	1.115
@@ -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 1.108 2006/06/30 21:24:27 www Exp $
+# $Id: default_homework.lcpm,v 1.115 2006/07/28 15:22:28 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -154,7 +154,11 @@ sub caparesponse_check {
     if ($type eq '9') {
       $result = &maxima_check(&maxima_cas_formula_fix($response),&maxima_cas_formula_fix($answer),\$reterror);
     } else {
-       $result = &caparesponse_capa_check_answer(&capa_formula_fix($response),&capa_formula_fix($answer),$type,
+	if ($type eq '8') { # fml type
+	    $response = &capa_formula_fix($response);
+	    $answer   = &capa_formula_fix($answer);
+	}
+       $result = &caparesponse_capa_check_answer($response,$answer,$type,
 						 $tol_type,$tol,
 						 $sig_lbound,$sig_ubound,
 						 $ans_fmt,$unit,$calc,$id_list,
@@ -196,9 +200,26 @@ sub capa_formula_fix {
 
 sub implicit_multiplication {
     my ($expression)=@_;
-    $expression=~s/\s+/\*/g;
-    $expression=~s/(\d)([a-zA-Z\(])/$1\*$2/g;
-    $expression=~s/\)(\w)/\)\*$1/g;
+# Escape scientific notation, so 3e8 does not become 3*e*8
+# 3e8 -> 3&8; 3e-8 -> 3&-8; 3E+8 -> e&+8
+    $expression=~s/(\d+)e([\+\-]*\d+)/$1\&\($2\)/gsi;
+# 3x10^8 -> 3&8; 3*10^-8 -> 3&-8
+    $expression=~s/(\d+)(?:x|\*)10(?:\^|\*\*)([\+\-]*\d+)/$1\&\($2\)/gsi;
+# Fill in multiplication signs
+# a b -> a*b;3 b -> 3*b;3 4 -> 3*4
+    $expression=~s/(\w)\s+(\w)/$1\*$2/gs;
+# )( -> )*(; ) ( -> )*(
+    $expression=~s/\)\s*\(/\)\*\(/gs;
+# 3a -> 3*a; 3( -> 3*(; 3 ( -> 3*(; 3A -> 3*A
+    $expression=~s/(\d)\s*([a-zA-Z\(])/$1\*$2/gs;
+# a ( -> a*(
+    $expression=~s/(\w)\s+\(/$1\*\(/gs;
+# a3 -> a*3;
+    $expression=~s/([a-zA-Z])(\d)/$1\*$2/gs;
+# )a -> )*a; )3 -> )*3; ) 3 -> )*3
+    $expression=~s/\)\s*(\w)/\)\*$1/gs;
+# 3&8 -> 3e8; 3&-4 -> 3e-4
+    $expression=~s/(\d+)\&\(([\+\-]*\d+)\)/$1e$2/gs;
     return $expression;
 }
 
@@ -833,6 +854,18 @@ sub class {
     return $course;
 }
 
+sub firstname {
+    my $firstname = &EXT('environment.firstname');
+    $firstname = '' if $firstname eq "";
+    return $firstname;
+}
+                                                                                
+sub lastname {
+    my $lastname = &EXT('environment.lastname');
+    $lastname = '' if $lastname eq "";
+    return $lastname;
+}
+
 sub sec { 
     my $sec = &EXT('request.course.sec');
     $sec = '' if $sec eq "";