In QtWidgets KAlgebra, you can start typing and get suggested expressions like abs, root etc. The most optimal UX (imo) would be if you could use other phrases / latex syntax and get the suggestions as well. For ex. \sqrt[3]{x} would give a suggestion to a root(...) function.
A possibly relevant merge request was started @ https://invent.kde.org/education/kalgebra/-/merge_requests/61
Git commit 56c67568e6373aaf3253b980f3e2c7dfcbb59010 by Aleix Pol Gonzalez, on behalf of Aleix Pol. Committed on 22/12/2024 at 12:33. Pushed by apol into branch 'master'. mobile/plots: Show examples for 2D and 3D plots Offers examples to plot to learn the syntax and functionalities. M +31 -0 mobile/content/ui/controls/AddPlotDialog.qml M +6 -0 mobile/kalgebramobile.cpp M +2 -0 mobile/kalgebramobile.h https://invent.kde.org/education/kalgebra/-/commit/56c67568e6373aaf3253b980f3e2c7dfcbb59010