#353 Add unit to Latex formula

[johan-tuls]

Description

Added a unit to the Latex formula

Fixes # (353)

Type of change

Please delete options that are not relevant.

• [X ] New feature (non-breaking change which adds functionality)

Checklist:

• [X ] I have added tests that prove my fix is effective or that my feature works
• [ X] I have commented my code, particularly in hard-to-understand areas
• [ X] I have made corresponding changes to the documentation
• [ X] New and existing unit tests pass locally with my changes

[github-actions]

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[egarciamendez]

Nice contribution :-)