--- loncom/homework/templates/HintFormula.problem	2007/01/22 21:48:55	1.1
+++ loncom/homework/templates/HintFormula.problem	2007/01/23 21:16:50	1.2
@@ -1,5 +1,5 @@
 <problem>
-<script type="loncapa/perl">
+    <script type="loncapa/perl">
 $a1=&random(3,6,1);
 $e1=&random(3,6,1);
 $a2=&random(6,8,1);
@@ -10,17 +10,19 @@ $de1=$e1-1;
 $de2=$e2-1;
 @derivative=($da1.'t^'.$de1,$da2.'t^'.$de2);
 @wrongderivative=($a1.'t^'.$de1,$a2.'t^'.$de2);
-</script>
-<startouttext />What is the derivative of
+    </script>
+    <startouttext />
+What is the derivative of
 <m eval="on">\[\left(\begin{array}{c}$a1 t^$e1\\ $a2 t^$e2\end{array}\right)\]</m>
-with respect to <m>$t$</m>?<endouttext />
-<formularesponse answer="@derivative">
-<textline readonly="no" size="25" />
-<hintgroup showoncorrect="no">
-<formulahint answer="@wrongderivative" name="nomulti"></formulahint>
-<hintpart on="nomulti">
-<startouttext />You need to multiply with the original exponent.<endouttext />
-</hintpart>
-</hintgroup>
-</formularesponse>
+with respect to <m>$t$</m>?
+    <endouttext />
+    <formularesponse answer="@derivative" samples="t@-10:10#10">
+        <textline readonly="no" size="25" />
+        <hintgroup showoncorrect="no">
+            <formulahint answer="@wrongderivative" name="nomulti" samples="t@-10:10#10"></formulahint>
+            <hintpart on="nomulti">
+                <startouttext />You need to multiply with the original exponent.<endouttext />
+            </hintpart>
+        </hintgroup>
+    </formularesponse>
 </problem>