test(expressions): add short tests for math ops

[mwong009]

Checklist

• There is an informative high-level description of the changes.
• The description and/or commit message(s) references the relevant GitHub issue(s).
• pre-commit is installed and set up.
• The commit messages follow these guidelines.
• The commits correspond to relevant logical changes, and there are no commits that fix changes introduced by other commits in the same branch/BR.
• There are tests covering the changes introduced in the PR.

Features

• feat: overhaul dependencies for conda feedstock

Fixes

• ...

Documentation

• style: update various code documentation

Maintenance

• test(expressions): add short tests for math ops
• ci(env): update ci build workflows

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (c2df619) 53.82% compared to head (ab98a44) 53.82%.
Report is 2 commits behind head on master.

❗ Current head ab98a44 differs from pull request most recent head 01414e9. Consider uploading reports for the commit 01414e9 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #92   +/-   ##
=======================================
  Coverage   53.82%   53.82%           
=======================================
  Files          17       17           
  Lines        1789     1789           
=======================================
  Hits          963      963           
  Misses        826      826           

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