diff --git a/fundamentals-of-ai-and-kr/main.pdf b/fundamentals-of-ai-and-kr/main.pdf
index a6f2025..ed2c75f 100644
Binary files a/fundamentals-of-ai-and-kr/main.pdf and b/fundamentals-of-ai-and-kr/main.pdf differ
diff --git a/machine-learning-and-data-mining/main.pdf b/machine-learning-and-data-mining/main.pdf
index c1050f4..805cb97 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 79abb4a..2e475e8 100644
Binary files a/statistical-and-mathematical-methods-for-ai/main.pdf and b/statistical-and-mathematical-methods-for-ai/main.pdf differ