Add math tutorials to the main tutorials branch (#1910)

* add new basic tutorial and jupyter_ sphinx extension

* add math basic tut

* updates on the prints

* grammar review

* update substitution text

* use only the jupyter sphinx extension

* update the basic_maths.rst to the tutorials guidelines

* update the index.rst to the tutorials guidelines

* updates on the text of the basic_maths.rst tutorial

* delete file basic_tutorial.rst

* Apply suggestions from code review

Co-authored-by: Jorge Martínez <[email protected]>

* Apply suggestions from code review

* Update doc/source/user_guide/tutorials/mathematics/basic_maths.rst

* First wave of corrections

* First wave of corrections

* More changes

* Rework basic_maths.rst

* Correct Lp norm description

* Apply suggestions from Jenna

Co-authored-by: JennaPaikowsky <[email protected]>

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Co-authored-by: Jorge Martínez <[email protected]>
Co-authored-by: Paul Profizi <[email protected]>
Co-authored-by: PProfizi <[email protected]>
Co-authored-by: JennaPaikowsky <[email protected]>

Author: 4 people