I have an awfully complicated expression depending on three variables m1, m2, m3 and a lot of parameters. When I try to substitute m1, m2 and m3 by 0, 0 and 1 respectively, m1, m2 and m3 are effectively replaced but lots of (0)s and (1)s appear after some of the parameters (and even 0(0), 1(0), 1(1), 0(1)...)
What does this mean and how to avoid it? Following is an example of the problem.
Sample of the answer:
Thank you very much,