diff --git a/README.md b/README.md
index acd5b06..3df13b9 100644
--- a/README.md
+++ b/README.md
@@ -35,7 +35,6 @@
 88 + 19 = 107
 29 * 77 = 2233
 88 / 10 = 8
-4 - 51 = -47
 86 / 5 = 17
 79 * 6 = 474
 76 * 13 = 988