Update dateModified and enhance MathML section

Updated the dateModified field and added new MathML content.

Author: Gmac4247

index.html

@@ -187,7 +187,7 @@
 },
 "dateCreated": "2019-01-11",
 "datePublished": "2020-01-11",
-"dateModified": "2025-09-30",
+"dateModified": "2025-10-16",
 "description": "Introducing the best-established and most accurate framework to calculate area and volume.",
 "disambiguatingDescription": "Exact, empirically grounded and rigorously proven formulas over the conventional approximations.",
 "headline": "Introducing the Core Geometric System ™",
@@ -2091,6 +2091,7 @@ <h2 style="font-size:160%;margin:7px;">Exact Geometry Formulas</h2>
 <mrow>
  <mi>V</mi>
 <mo>=</mo>
+<mrow>
   <msup>
     <mrow>
       <mo>(</mo>
@@ -2103,6 +2104,27 @@ <h2 style="font-size:160%;margin:7px;">Exact Geometry Formulas</h2>
     </mrow>
     <mn>3</mn>
   </msup>
+</mrow>
+<mo>=</mo>
+<mrow>
+  <msup>
+    <mrow>
+      <mo>(</mo>
+		<mfrac>
+		<mrow>
+      <mn>4</mn>
+	<mo>&#x00D7;</mo>
+      <mi>r</mi>
+		</mrow>
+			<msqrt>
+        <mn>5</mn>
+      </msqrt>
+		</mfrac>
+      <mo>)</mo>
+    </mrow>
+    <mn>3</mn>
+  </msup>
+</mrow>
 </math>
 <br>
 <br>