diff --git a/README.md b/README.md
index a7349bd..e0d5c6b 100644
--- a/README.md
+++ b/README.md
@@ -36,7 +36,6 @@
 33 - 19 = 14
 74 - 40 = 34
 44 * 58 = 2552
-4 - 68 = -64
 94 - 90 = 4
 95 * 51 = 4845
 43 * 97 = 4171