Hello! I'm looking for a FOSS replacement for the calculator app that I currently use, N-CALC, that is now not even released in the play store (http://play.google.com/store/apps/details?id=com.duy.calc.casio) and only available from sites like APKFree. I tried all the various calculator apps on F-droid but none of them supported "rich text" (I don't know how to call it):

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Any tips?

thanks in advance!