analytic function in another analytic function

Hi,

I have two questions:
1. an analytic cunction that has one argument - sigmaxx that I want to incorperate in another analytic function that has another argument = ec.normE. I cant do it no matter what I try. Please help me. I am using comsol 4.2a

2. I am trying to incorporate an interpolation function inside an analytiv function. Again with ni succuss.

Can someone explain to me why and how to silve the problem

ave_m=(b_thresh+((b_thresh-d_thresh)*flc2hs(sigmaxx-0.7,0.35)+700))/2
diff_m(-b_thresh+((b_thresh-d_thresh)*flc2hs(sigmaxx-0.7,0.35)+700))/2

arguments-sigmaxx

an1=(flc2hs(ec.normE-ave_m(sigmaxx[1/(s/m)]),diff_m(sigmaxx[1/(s/m)])))
arguments: ec.normE, sigmaxx

error:
Wrong number of function arguments.

thanks
Shirley