I prepared www.matematikproblemi.com .There are more than 8000 pages , 1100 math test pages , 18 000 math questions.I prepared 14 000 of math questions. I also prepared a program based on Javascript and SVG for math question preparation. https://www.youtube.com/watch?v=G9YYKf2DUv0&t=83s I have knowledge C# , Javascript , SVG, Xamarin Forms , HTML , XML , LINQ, Unit test etc. I publish some android apps. https://play.google.com/store/apps/developer?id=Matematik+problemi