diff --git a/SM3中的FF2和GG2函数.md b/SM3中的FF2和GG2函数.md
index 18d3734..49174ac 100644
--- a/SM3中的FF2和GG2函数.md
+++ b/SM3中的FF2和GG2函数.md
@@ -53,4 +53,9 @@ $FF2(X, Y, Z) = (X \land Y) \bigoplus (X \land Z) \bigoplus (Y \land Z)$
 $(X \land Y) \bigoplus (X \land Z) $  
 = $X \land (Y \bigoplus Z)$  
 = $X \land ((Y \land \lnot Z) \lor (\lnot Y \land Z))$  
-= $(X \land Y \land \lnot Z) \lor (X \land Z \land \lnot Y)$  
\ No newline at end of file
+= $(X \land Y \land \lnot Z) \lor (X \land Z \land \lnot Y)$  
+
+$\lnot((X \land Y \land \lnot Z) \lor (X \land Z \land \lnot Y))$  
+= $\lnot(X \land Y \land \lnot Z) \land \lnot(X \land Z \land \lnot Y)$   
+
+