professional calculator
A free web demo — play it in your browser, no install. Zero-dependency scientific computing engine + interactive workstation (vanilla JS, no build step): 28-module math kernel, a 48-calculator suite (257 ops), interactive 2D/3D graphing, a physics & quantum 3D/4D simulation lab, and a knowledge atlas. 1123 closed-form-anchored tests.
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Open the live demo Source on GitHubFrom the README
A zero-dependency, framework-free scientific computing engine — and a full interactive workstation — that runs in the browser and Node.
Most "calculator" projects stop at four functions and a grid of buttons.
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