diff --git a/README.md b/README.md
index e17b2dc..b90901f 100644
--- a/README.md
+++ b/README.md
@@ -37,7 +37,6 @@
 6 + 15 = 21
 15 * 100 = 1500
 17 * 41 = 697
-66 - 88 = -22
 100 - 100 = 0
 93 + 2 = 95
 21 + 44 = 65