diff --git a/README.md b/README.md
index e70f6de..3700471 100644
--- a/README.md
+++ b/README.md
@@ -16,4 +16,46 @@ Just a test project
 | Foo  | *Bar* |
 | Key  | Value |
 </p>
-</details>
\ No newline at end of file
+</details>
+
+## MAth
+
+This sentence uses `$` delimiters to show math inline:  $\sqrt{3x-1}+(1+x)^2$
+
+## GEO
+
+```topojson
+{
+  "type": "Topology",
+  "transform": {
+    "scale": [0.0005000500050005, 0.00010001000100010001],
+    "translate": [100, 0]
+  },
+  "objects": {
+    "example": {
+      "type": "GeometryCollection",
+      "geometries": [
+        {
+          "type": "Point",
+          "properties": {"prop0": "value0"},
+          "coordinates": [4000, 5000]
+        },
+        {
+          "type": "LineString",
+          "properties": {"prop0": "value0", "prop1": 0},
+          "arcs": [0]
+        },
+        {
+          "type": "Polygon",
+          "properties": {"prop0": "value0",
+            "prop1": {"this": "that"}
+          },
+          "arcs": [[1]]
+        }
+      ]
+    }
+  },
+  "arcs": [[[4000, 0], [1999, 9999], [2000, -9999], [2000, 9999]],[[0, 0], [0, 9999], [2000, 0], [0, -9999], [-2000, 0]]]
+}
+```
+