diff --git a/README.md b/README.md
index a8ff303..1b27a0e 100644
--- a/README.md
+++ b/README.md
@@ -33,7 +33,6 @@
 45 - 7 = 38
 22 * 40 = 880
 37 / 1 = 37
-91 - 87 = 4
 14 * 99 = 1386
 5 / 2 = 2
 37 + 58 = 95