title: Best Free C# Math Parser using variables, user defined functions, custom operators
body: <p>I'm looking for a .NET Math Parser which uses variables, custom operators and user defined functions...
  Since today i've used muParser (there's a wrapped version for .NET), but i noticed it is too slow!</p>
  
  <p>Does anybody knows another Math Parser (FREE!) that works pretty good?</p>
  
  <p>I tried NCalc, but it doesn't have variables, so it fails..</p>