I'm not sure if this is digital art, this is my entry anyway.  You have to press enter to plot the graph and find the deriviative.

I'm still running tests and improving it.  I would like to have the program draw a tangent line on the graph

Sometimes it does not display the equation and I don't know why.

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"Only those that risk going too far can possibly know how far they can go." - Class of 2007 motto - Author unknown