Tests for floor function precision errors

[rohan-agr]

References to other Issues or PRs

Adds tests related to issue #26368

Brief description of what is fixed or changed

Adds tests for floor function to verify that large numbers do not result in precision errors

Other comments

Release Notes

• core
  • Adds tests to test_evalf.py for floor() function

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• core
  • Adds tests to test_evalf.py for floor() function (#26537 by @rohan-agr)

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#### References to other Issues or PRs
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Adds tests related to issue #26368

#### Brief description of what is fixed or changed
Adds tests for floor function to verify that large numbers do not result in precision errors


#### Other comments


#### Release Notes

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  * Added a new solver for logarithmic equations.

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  * Fixed a bug with log of integers. Formerly, `log(-x)` incorrectly gave `-log(x)`.

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* core
    * Adds tests to test_evalf.py for floor() function 

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[smichr]

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