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Building-services calculations with visible equations

Physics calculations with visual explanations

Location-based photovoltaic performance calculations

Panel cutting layouts and cabinetry cost calculations

Brewing recipe calculation across desktop and web

Air-travel carbon estimates with a published methodology

Editable notes with live scientific calculations

Notes, variables and arithmetic in a browser

A maintained HP-42S calculator simulator

Everyday calculation tools in one mobile app

Editable calculations with automatic dependency updates

Symbolic and numerical mathematics with notebook interfaces

Symbolic expressions with documented algorithms

Matrix-based numerical calculation and visualization

Symbolic calculation through a compact command interface

Mathematical documents that combine solutions and visualization

Heat-network and district-energy scenario calculations

Energy-system performance and financial calculations

Molecular masses, formulas and isotope distributions

Calculated physical and chemical protein parameters

Weather quantities with linked formulas

Scientific, graphing, fraction and matrix calculations

A focused math solver with examples and reference links

Symbolic, numerical and graphical mathematics tools