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Numerical, symbolic and plotting tools for mathematical work

Portable symbolic algebra with numerical approximation

Nucleic-acid folding calculations with explicit constraints

Calculators for work, study and household questions

Practical finance, cooking and unit calculations

A catalogue of practical and specialist calculations

Focused browser calculators for statistical questions

Epidemiological calculations for surveys and test performance

Statistical power and effect-size calculation

Browser tools for beam and structural calculations

Building-services calculations with visible equations

Physics calculations with visual explanations

RF and microwave calculations with formula references

Component calculations for practical electronics

Circuit and electrical formulas grouped by task

Solar position, photovoltaic and map calculations

Location-based photovoltaic performance calculations

Audio, acoustics and electrical calculation references

Editable notes with live scientific calculations

Notes, variables and arithmetic in a browser

Mathematical documents that combine solutions and visualization

Heat-network and district-energy scenario calculations

Calculated physical and chemical protein parameters

Laboratory calculations beside molecular-biology utilities