diff --git a/TODO.md b/TODO.md
index 36dd696..7a69a8e 100644
--- a/TODO.md
+++ b/TODO.md
@@ -2,7 +2,6 @@
  - Commands to list constants, units, and substitutions
  - list and delete variables
  - Re-evaluate variables (a = q + 2, q = 3, a should evaluate to 5)
- - 2x^-1 as superscript