not working sym, syms and subs commands in matlab???

hello, i am a new user of matlab . i am facing a Problem concerning the commands sym, syms and subs. These commands are not working for my Version of Matlab 2014 Toolbox package. sym and syms are known for symbolic representation in matlab while subs is used for substituting values in expressions and symbolic variables. when i type help sym or help syms it says ' sym not found'. when i type help subs it says 'Utilities for obsolete MUTOOLS commands.'

please help thanks

[Dasharath Gulvady]

Hussein, what is the output of "which" command for "sym"?

Type the following on your MATLAB to see the output:

which -all sym