GoKawiilOpen-source FlowCE app brings symbolic calculus to TI-84 Plus CE calculators
FlowCE is a free, open-source application for the TI-84 Plus CE and TI-83 Premium CE calculators that lets users enter mathematical expressions in standard notation. It returns results in exact symbolic form, such as π²/6, alongside the corresponding decimal approximation. The software is released under the GNU GPL license.