return derivative's result as string

[dyako-baram]

end goal:

i want to be able to do derivative until I get a single number for example:
fx= x^3 + x^2 - 3x -3
fx'=3x^2 +2x-3
fx''=6x-2
fx'''=6

question:

• MathParser.org-mXparser version: v.5.2.1
• Framework: .net, .net core, .net standard

How do I achieve what I want to do?

here is a pseudo-code for what I mean:

Expression ex = new Expression("der(x^3 + x^2 - 3x -3 ,x)");
string result=ex.GetDerivativeAsString(); // 3x^2 +2x-3

or

Expression ex = new Expression("der(x^3 + x^2 - 3x -3 ,x)");
string[] resultArray= ex.GetDerivativesAsStringArray();// ["x^3 + x^2 - 3x -3 ","3x^2 +2x-3","6x-2","6"]