Problem 53935. Sum of two number using (regexp, varargin) comand?

@Abhay
1 - Atleast give 4 test cases while submitting a problem.
2 - Do not give the solution in your function template (I have removed it)
3 - If you don't know how to ensure that certain function(s) are used or not, see other problems. For e.g Restricted Addition series.
4 - Makes these necessary changes soon or the problem will be brought down until you make those changes, given the trivial nature of your problem right now.

@Dyuman Joshi thx for your advice but I am new to matlab and I don't know how to do all that stuff if you don't mind could I get your email for further queries I have

Errors in the test suite have been corrected.