diff --git a/arithmetic.txt b/arithmetic.txt
index 9e02457..48bb977 100644
--- a/arithmetic.txt
+++ b/arithmetic.txt
@@ -1 +1 @@
-1 + 22 * (3 - 4)
\ No newline at end of file
+1 + 2 * (15 + 12 * -4 / 2)
\ No newline at end of file