diff --git a/math/logic/fc_sets.png b/math/logic/fc_sets.png
index dbb0b09..bf0eda1 100644
Binary files a/math/logic/fc_sets.png and b/math/logic/fc_sets.png differ
diff --git a/math/logic/k3.png b/math/logic/k3.png
index 0d990a7..c7bdd5d 100644
Binary files a/math/logic/k3.png and b/math/logic/k3.png differ
diff --git a/math/logic/k5.png b/math/logic/k5.png
index afa9ab4..f59cf86 100644
Binary files a/math/logic/k5.png and b/math/logic/k5.png differ