Step 2* - Download ``formulas-wf``
----------------------------------

Go to the `formulas-wf <https://github.com/Elteoremadebeethoven/formulas-wf>`_ repository and copy the FORMULAS folder to the main Manim folder. Then, in the subfolder ``FORMULAS/TXT`` save a `txt` file with all the formulas, in the order you defined in the sketch of **Step 1**.
In this example, since we are doing the animation of the quadratic equation, we will save the file as ``quadratic``, that is, this file will be in ``FORMULAS/TXT/quadratic.txt``. 

This step will only have to be done once, since all the groups of formulas you want can be saved in ``FORMULAS/TXT/``, that is, if you want to create an animation where an equation is deduced, you can save it in ``FORMULAS/TXT/formula_deduction.txt``, where ``formula_deduction.txt`` contains all the formulas in order.

In this example, the ``quadratic`` file is this:

.. code-block::
    :linenos:

    ax^2+bx+c=0
    ax^2+bx=-c
    x^2+{b\over a}x=-{c\over a}
    x^2+{b\over a}x+\left({b\over 2a}\right)^2=-{c\over a}+\left({b\over 2a}\right)^2
    \left(x+{b\over 2a}\right)^2=-{c\over a}+\left({b\over 2a}\right)^2
    \left(x+{b\over 2a}\right)^2=-{c\over a}+{b^2\over 4a^2}
    \left(x+{b\over 2a}\right)^2={b^2\over 4a^2}-{c\over a}
    \left(x+{b\over 2a}\right)^2={b^2\over 4a^2}-{4c\over 4a}
    \left(x+{b\over 2a}\right)^2={b^2\over 4a^2}-{4ac\over 4a^2}
    \left(x+{b\over 2a}\right)^2a={b^2-4ac\over 4a^2}
    \sqrt{\left(x+{b\over 2a}\right)^2}=\pm\sqrt{{b^2-4ac\over 4a^2}}
    x+{b\over 2a}=\pm\sqrt{{b^2-4ac\over 4a^2}}
    x=-{b\over 2a}\pm\sqrt{{b^2-4ac\over 4a^2}}
    x=-{b\over 2a}\pm{\sqrt{b^2-4ac}\over 2a}
    x={-b\pm\sqrt{b^2-4ac}\over 2a}

.. image:: /_static/img1.png