Fix math extraction (#503)
* extract matching
* better docstring
* lazy imports
* bump up math
* Update src/lighteval/metrics/dynamic_metrics.py
Co-authored-by: Clémentine Fourrier <22726840+clefourrier@users.noreply.github.com>
* fix pr commnets
* Apply suggestions from code review
Co-authored-by: Clémentine Fourrier <22726840+clefourrier@users.noreply.github.com>
* rename comparisson -> comparison
* fix expr numbers extraction with currency or units
* add test for correct extraction of failed answer
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Co-authored-by: Clémentine Fourrier <22726840+clefourrier@users.noreply.github.com>
