Calculator

A scientific calculator which is able to solve exponential growth problems.
Functionality:
- basic arithmetic operations
- powers, roots, logarithms, etc.
- prime factorization
- combinations, permutations
- trigonometric and hyperbolic functions
- fractions, mixed numbers
- convertion between polar and rectangular coordinates
- scientific and engineering notation
- result history
- variables
- many settings:
- customizable colors, button shapes, etc.
- preferred output ( fraction, decimal, scientific, engineering )
- Solving exponential growth problems


I plan to add more functionality like gcd and lcm functions, as well as extending the converting of two dimensional coordinates to three dimensions.
I would love to get suggestions for more functions.
Please point out any unwanted behavior in the comments / reviews or at https://forms.gle/i3SPRrFwkr1oT3KV9 .

Thank you!