How can i make a calculator soft that cold perform the integration n differentiation

Hello friends ........

I want to make a calculator software that could perform differentiation and integration, and solve some common type of differential equations. And It can also demonstrate the process used to get answer. that could help students as tutor. May i get any help from you!

Thanks..........

problem refinement of calculator soft problem

First of all thank u for showing interest in the topic.

I was intended to make a software (program) that could allow an user to program it, for solving the integration, differentiation n differential equations of some specific type like "first order first degree" equations of "Clariut's" form and so on by using the classical way, means without the method of "numeric analysis" and also illustrate the process steps carried out to reach the answer with little description of the reasons to adopt used one when ever there are more than one possibilities.

And the target users are the graduate and udergraduate mathematics students, who could use it as tutor to get the solution of their problems that come while studying usually.

And Lastlly it is not required to embed it in some hardware to exploit the functions of this calculator but it could run on any computer networked or stand-alone.

Please guide who one can me........

Thanks again......