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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

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

Math input with worked examples across several subjects

Visual calculator forms with custom price rules

A TI graphing-calculator emulator for classroom explanation

Plot equations and coordinate data in two or three dimensions

Geometry and mathematical exploration with constructed figures

Everyday calculation categories with a simple keypad

Subnet planning alongside IPv4 and IPv6 diagnostics