Fixes #9943 Added Doctests to binary_exponentiation_3.py (#10121)

* Python mirror_formulae.py is added to the repository

* Changes done after reading readme.md

* Changes for running doctest on all platforms

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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* Change 2 for Doctests

* Changes for doctest 2

* updating DIRECTORY.md

* Doctest whitespace error rectification to mirror_formulae.py

* updating DIRECTORY.md

* Adding Thermodynamic Work Done Formulae

* Work done on/by body in a thermodynamic setting

* updating DIRECTORY.md

* updating DIRECTORY.md

* Doctest adiition to binary_exponentiation_3.py

* Change 1

* updating DIRECTORY.md

* Rename binary_exponentiation_3.py to binary_exponentiation_2.py

* updating DIRECTORY.md

* updating DIRECTORY.md

* Formatting

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