Previously implemented the Sheet-Based Calculator app already available on Google Play [login to view URL]
However, it is limited as the current calculator interpretation engine was a simple one that was made from scratch by the previously. There is an excellent open-source calculator interpretation engine called BC [login to view URL]
Your task is to port BC to the Sheet-based Calculator and to add GnuPlot [login to view URL] to it so that it can also plot graphs.
Here is the download link for the previous app
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