MATLAB: Problem with simplify a symbolic expression

Question

Dear professionals in MATLAB,

I have a problem:

I have:

syms a b c d e f RES;
RES=10*a+sin(b)+(4967757600021511*sin(c+d))/81129638414606681695789005144064+e/f;

and I want to simplify a RES, such that I will obtain:

RES=10*a+sin(b)+e/f;

is it possible or no?

I would be very grateful for help!

Answer 1

No, that is not possible unless you can add that (c+d) is a multiple of Pi.