AngouriMath

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RewriteStep


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Description

Summary

One rewrite that actually fired: which rule set did it, the subexpression it matched,
and what it put there instead.

Remarks

The subexpression, not the whole expression. A rewrite pass walks the tree bottom-up
and rewrites nodes as it goes, so there is no moment at which a partly-rewritten
whole expression exists to be photographed — reporting one would mean building it,
and it would be a picture of something the engine never held.

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