Update STACK sample materials.

samplequestions/stacklibrary/Algebra-Refresher/02-Factorisation-of-whole-numbers/AlgMap-2-2.xml

@@ -20,8 +20,7 @@
     <questionvariables>
       <text>a:2^(rand(1)+1)*3^(rand(2))*5^(rand(2));
 b:2^(rand(1)+1)*3^(rand(2))*5^(rand(2))*7;
-ta:ratsimp(rootscontract(radcan(sqrt(a)*sqrt(b))));
-</text>
+ta:ratsimp(rootscontract(radcan(sqrt(a)*sqrt(b))));</text>
     </questionvariables>
     <specificfeedback format="html">
       <text><![CDATA[<p>[[feedback:prt1]]</p>]]></text>

samplequestions/stacklibrary/Algebra-Refresher/03-Addition-and-subtraction-of-fractions/AlgMap-3-1.xml

@@ -26,8 +26,7 @@ d:b;
 c:d+1;
 ta:(a/b)+(c/d);
 lcm:lcm(b,d);
-simp:false;
-</text>
+simp:false;</text>
     </questionvariables>
     <specificfeedback format="html">
       <text><![CDATA[<p>[[feedback:prt1]]</p>]]></text>

samplequestions/stacklibrary/Algebra-Refresher/03-Addition-and-subtraction-of-fractions/AlgMap-3-2.xml

@@ -26,8 +26,7 @@ d:b;
 c:d+rand(3)+1;
 ta:(a/b)-(c/d);
 lcm:lcm(b,d);
-simp:false;
-</text>
+simp:false;</text>
     </questionvariables>
     <specificfeedback format="html">
       <text><![CDATA[<p>[[feedback:prt1]]</p>]]></text>

samplequestions/stacklibrary/Algebra-Refresher/03-Addition-and-subtraction-of-fractions/AlgMap-3-3.xml

@@ -27,8 +27,7 @@ d:b+1+2*rand(3);
 c:d+rand(3)+1;
 ta:(a/b)+(c/d);
 lcm:lcm(b,d);
-simp:false;
-</text>
+simp:false;</text>
     </questionvariables>
     <specificfeedback format="html">
       <text><![CDATA[<p>[[feedback:prt1]]</p>]]></text>

samplequestions/stacklibrary/Algebra-Refresher/03-Addition-and-subtraction-of-fractions/AlgMap-3-4.xml

@@ -27,8 +27,7 @@ d:rand([3,7,11]);
 c:rand([2,5,13])^rand([0,1]);
 ta:(a/b)-(c/d);
 lcm:lcm(b,d);
-simp:false;
-</text>
+simp:false;</text>
     </questionvariables>
     <specificfeedback format="html">
       <text><![CDATA[<p>[[feedback:prt1]]</p>]]></text>

samplequestions/stacklibrary/Algebra-Refresher/03-Addition-and-subtraction-of-fractions/AlgMap-3-5.xml

@@ -27,8 +27,7 @@ d:7;
 c:rand([1,2,3,4,5,6,8,9]);
 ta:(a/b)+(c/d);
 lcm:lcm(b,d);
-simp:false;
-</text>
+simp:false;</text>
     </questionvariables>
     <specificfeedback format="html">
       <text><![CDATA[<p>[[feedback:prt1]]</p>]]></text>

samplequestions/stacklibrary/Algebra-Refresher/03-Addition-and-subtraction-of-fractions/AlgMap-3-6.xml

@@ -27,8 +27,7 @@ d:3;
 c:rand([1,2,4,5,7,8,10]);
 ta:(a/b)-(c/d);
 lcm:lcm(b,d);
-simp:false;
-</text>
+simp:false;</text>
     </questionvariables>
     <specificfeedback format="html">
       <text><![CDATA[<p>[[feedback:prt1]]</p>]]></text>

samplequestions/stacklibrary/Algebra-Refresher/03-Addition-and-subtraction-of-fractions/AlgMap-3-7.xml

@@ -28,8 +28,7 @@ d:f*b;
 c:d-1;
 ta:(a/b)+(c/d);
 lcm:lcm(b,d);
-simp:false;
-</text>
+simp:false;</text>
     </questionvariables>
     <specificfeedback format="html">
       <text><![CDATA[<p>[[feedback:prt1]]</p>]]></text>

samplequestions/stacklibrary/Algebra-Refresher/03-Addition-and-subtraction-of-fractions/AlgMap-3-8.xml

@@ -28,8 +28,7 @@ d:f*b;
 c:1;
 ta:(a/b)-(c/d);
 lcm:lcm(b,d);
-simp:false
-</text>
+simp:false</text>
     </questionvariables>
     <specificfeedback format="html">
       <text><![CDATA[<p>[[feedback:prt1]]</p>]]></text>

samplequestions/stacklibrary/Algebra-Refresher/03-Addition-and-subtraction-of-fractions/AlgMap-3-9.xml

@@ -28,8 +28,7 @@ d:f*rand([2,4]);
 c:d+1;
 ta:(a/b)+(c/d);
 lcm:lcm(b,d);
-simp:false;
-</text>
+simp:false;</text>
     </questionvariables>
     <specificfeedback format="html">
       <text><![CDATA[<p>[[feedback:prt1]]</p>]]></text>

samplequestions/stacklibrary/Algebra-Refresher/05-Combinations-of-arithmetic-operations-on-fractions/AlgMap-5-1.xml

@@ -28,8 +28,7 @@ f:e+rand(4)+1;
 g:rand(5)+1;
 h:g+rand(4)+1;
 ta:((a/b)+(c/d))/((e/f)+(g/h));
-simp:false;
-</text>
+simp:false;</text>
     </questionvariables>
     <specificfeedback format="html">
       <text><![CDATA[<p>[[feedback:prt1]]</p>]]></text>

samplequestions/stacklibrary/Algebra-Refresher/05-Combinations-of-arithmetic-operations-on-fractions/AlgMap-5-2.xml

@@ -28,8 +28,7 @@ t:c/d;
 ta1:(s^2+2*t^2);
 ta2:(3-s*t);
 ta:ta1/ta2;
-simp:false;
-</text>
+simp:false;</text>
     </questionvariables>
     <specificfeedback format="html">
       <text><![CDATA[<p>[[feedback:prt1]]</p>]]></text>

samplequestions/stacklibrary/Algebra-Refresher/08-Algebraic-fractions/AlgMap-8-21.xml

@@ -157,7 +157,7 @@ fta:ev(factor(ta),simp);</text>
       </expected>
     </qtest>
     <qtest>
-      <testcase>3</testcase>
+      <testcase>2</testcase>
       <description/>
       <testinput>
         <name>ans</name>

samplequestions/stacklibrary/Algebra-Refresher/08-Algebraic-fractions/AlgMap-8-23.xml

@@ -11,8 +11,7 @@
 Give an equivalent expression without brackets. 
 <br>
 = [[input:ans]] 
-[[validation:ans]]
-]]></text>
+[[validation:ans]]]]></text>
     </questiontext>
     <generalfeedback format="html">
       <text><![CDATA[<html>