diff --git a/TODO.md b/TODO.md
index 0d7c8c4..2290574 100644
--- a/TODO.md
+++ b/TODO.md
@@ -6,4 +6,5 @@
         - Dynamically delete inputs
         - Different colors
         - Better Handling of area and integrals
-2. Non `y=` functions.
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+2. Cache data when not zooming.
+3. Non `y=` functions.
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