diff --git a/README.md b/README.md
index 4ee3fd5..7025739 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,6 @@
 53 - 2 = 51
 62 * 61 = 3782
 57 - 55 = 2
-87 - 99 = -12
 85 * 16 = 1360
 41 * 21 = 861
 93 - 66 = 27