The function parser and math engine of the iOS / macOS app Oovium, including a command line version: oov.
It is possible to use SPM to integrate OoviumEngine into a project. Add the following to your dependencies:
.package(url: "https://github.com/aepryus/OoviumEngine.git", from: "3.0.0"),Or from Xcode go to File/Add Packages and enter the URL: https://github.com/aepryus/OoviumEngine.git.