Update index.html

Section

Author: Gmac4247

index.html

@@ -4519,7 +4519,6 @@ <h3 style="font-size:160%;margin:7px">
         <mi>bottom edge</mi>
 </mrow>
 </math>
-</section>
 <br>
 <br>
 <math style="margin:12px;" xmlns="http://www.w3.org/1998/Math/MathML">
@@ -4875,6 +4874,7 @@ <h3 style="font-size:160%;margin:7px">
 </section>
 </section>
 </section>
+</section>
 </article>
 <br>
 <br>