Paper Calculator 4+

Paper Calculator is a calculator with a free-form text input.

You do not need to enter calculations one-by-one like a cave-mathematician.

Edit mistakes. Make changes. Add and remove parentheses for clarity.

See the whole calculation.

Provides granular error messages, with helpful actions.

Supports:
- Addition, Subtraction, Multiplication and Division
- Exponents (Powers), Roots (square root, cube root, etc.)
- Percentages, Factorials
- Trigonometry, Logarithms
- Radians, Degrees
- Parentheses
- Constants: e, pi

Logarithms
- Natural, base e (ln)
- Binary, base 2 (lb)
- Common, base 10 (lg)
- supports arbitrary base

Trigonometry
- Sine, Cosine, Tangent
- Hyperbolic- Sine, Cosine, Tangent
- Arc- Sine, Cosine, Tangent
- Hyperbolic Arc- Sine, Cosine, Tangent

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