diff --git a/source/_posts/homework3.md b/source/_posts/homework3.md
index 9fadd12..6af706c 100644
--- a/source/_posts/homework3.md
+++ b/source/_posts/homework3.md
@@ -14,7 +14,7 @@ tags:
 |   #   | 表达式                          |
 | :---: | :------------------------------ |
 |   1   | `a + b > c && b == c`           |
-|   2   | `a || b + c && b = c`           |
+|   2   | `a || b + c && b - c`           |
 |   3   | `!(a > b) && !c || 1`           |
 |   4   | `!(x = a) && (y = b) && 0`      |
 |   5   | `!(a + b) + c - 1 && b + c / 2` |