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Brazilian online stores with marketplace connections and stock-aware product kits

Solve and inspect mathematical expressions

Algebra and calculus through dedicated solvers

Math and electrical calculations in a compact tool directory

A graphing-calculator emulator in the browser

Scientific and everyday calculations with units

High-precision scientific calculation with reusable expressions

Arbitrary-precision arithmetic that keeps track of units

A desktop calculator with recall and configurable precision

Arithmetic, finance and programming modes in one app

Matrix operations with exact expressions in cells

Scientific calculation with RPN and programmable functions

Integration with visible input, steps and graphs

Date, number and measurement calculations

Programmable scientific arithmetic with saved formulas

Statistical calculations with method-selection guidance

Statistical power and effect-size calculation

Browser-based statistics from pasted data

Structural calculations with visible formulas and references

Interactive beam, frame and truss analysis

Beam analysis that can continue into a 2D model

Building-services calculations with visible equations

Physics calculations with visual explanations

Solar position, photovoltaic and map calculations