diff --git a/.hash b/.hash
index 139e9d6..0ef8d4a 100644
--- a/.hash
+++ b/.hash
@@ -1,7 +1,7 @@
-ainotes.cls,1ba72c4
+ainotes.cls,9d452d7
 fundamentals-of-ai-and-kr/module1,a2e8cd8
 fundamentals-of-ai-and-kr/module2,b60d21d
 fundamentals-of-ai-and-kr/module3,0d20851
 languages-and-algorithms-for-ai/module2,e5659dd
 machine-learning-and-data-mining,dafa14c
-statistical-and-mathematical-methods-for-ai,1ba72c4
+statistical-and-mathematical-methods-for-ai,9d452d7
diff --git a/fundamentals-of-ai-and-kr/module1/main.pdf b/fundamentals-of-ai-and-kr/module1/main.pdf
index c893cdb..09ede0d 100644
Binary files a/fundamentals-of-ai-and-kr/module1/main.pdf and b/fundamentals-of-ai-and-kr/module1/main.pdf differ
diff --git a/fundamentals-of-ai-and-kr/module2/main.pdf b/fundamentals-of-ai-and-kr/module2/main.pdf
index c4cc94d..1d81465 100644
Binary files a/fundamentals-of-ai-and-kr/module2/main.pdf and b/fundamentals-of-ai-and-kr/module2/main.pdf differ
diff --git a/fundamentals-of-ai-and-kr/module3/main.pdf b/fundamentals-of-ai-and-kr/module3/main.pdf
index 06aa05d..a0eaafe 100644
Binary files a/fundamentals-of-ai-and-kr/module3/main.pdf and b/fundamentals-of-ai-and-kr/module3/main.pdf differ
diff --git a/languages-and-algorithms-for-ai/module2/main.pdf b/languages-and-algorithms-for-ai/module2/main.pdf
index 2531204..d2d0d1c 100644
Binary files a/languages-and-algorithms-for-ai/module2/main.pdf and b/languages-and-algorithms-for-ai/module2/main.pdf differ
diff --git a/machine-learning-and-data-mining/main.pdf b/machine-learning-and-data-mining/main.pdf
index 1f36158..c83bb43 100644
Binary files a/machine-learning-and-data-mining/main.pdf and b/machine-learning-and-data-mining/main.pdf differ
diff --git a/statistical-and-mathematical-methods-for-ai/main.pdf b/statistical-and-mathematical-methods-for-ai/main.pdf
index 945c2f5..2f4f84a 100644
Binary files a/statistical-and-mathematical-methods-for-ai/main.pdf and b/statistical-and-mathematical-methods-for-ai/main.pdf differ