diff --git a/Math.md b/Math.md
new file mode 100644
index 0000000..bd19f28
--- /dev/null
+++ b/Math.md
@@ -0,0 +1,5 @@
+# math
+
+distance = \sqrt{	\sum_{i=1}^{192} (first_i - second_i)^2 }  
+confidence = 2 * (0.5 - distance)  
+simmilarity = 1 - confidence