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*View this file with results and syntax highlighting [here](https://mlochbaum.github.io/BQN/help/undo.html).*
# Superscript Equals Sign (`⁼`)
## `𝔽⁼ 𝕩`, `𝕨 𝔽⁼ 𝕩`: Undo
[→full documentation](../doc/undo.md)
Invert the function `𝔽`, or use its defined inverse. Not all functions have inverses.
1 - 2
1 -⁼ 2
√ 16
√⁼ 4
⋆ 1
⋆⁼ 2.718281828459045
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