Scientific calculator lite

this is going to be super fun to use and saves a lot of time
The calculator has up to 100 digits of significand and 9 digits of exponent. It detects repeating decimals and numbers can be also entered as fractions or converted to fractions.

You can write expressions in a natural way and watch your calculations. The result is displayed as a number, simplified expression etc.

The calculator has several layouts suitable for various screen sizes:
- "pocket" for small devices
- "compact" for smartphones (in portrait and landscape orientation)
- "expanded" for tablets

A multiline display can be turned on in tablets to show the complete history of calculations and to provide access the previous results.

Users can choose from several high-quality themes.

The calculator has many functions, such as:
- basic arithmetic operations including percentage, modulo and negation;
- fractions (in the expression mode any expression including nested fractions can be entered as a numerator and a denominator);
- mixed numbers;
- periodic numbers and their conversion to fractions;
- unlimited number of braces;
- operator priority;
- repeated operations;
- equations
- variables and symbolic computation;
- derivatives and integrals;
- graphs of functions and integral area, 3D graphs;
- calculation details - extended information about a calculation like all complex roots, unit circle etc.;
- complex numbers
- conversion between rectangular and polar coordinates
- sums and products of sequences
- advanced number operations such as random numbers, combinations, permutations, common greatest divisor, etc.;
- trigonometric and hyperbolic functions;
- powers, roots, logarithms, etc.;
- degrees, minutes and seconds conversion;
- fixed point, scientific and engineering display format;
- display exponent as SI units prefix;
- memory operations with 10 extended memories;
- clipboard operations with various clipboard formats;
- result history;
- binary, octal and hexadecimal numeral systems;
- logical operations;
- bitwise shifts and rotations;
- haptic feedback;
- more than 90 physical constants;
- conversion among 250 units;
- Reverse Polish notation.

The calculator has many settings to manage the full screen mode, decimal and thousand separators, etc.

All features are described with a built-in help.