I have the following:

As(s) = ((F0*(alpha-beta)/(2*(s^2+(alpha-beta)^2)))-(F0*(alpha+beta)/(2*(s^2+(alpha+beta)^2))))/(m1+m3);
m = 1; % [kg]
c = 2; % [kg/s]
k = 2; % [N/m]
m1 = 1; % [kg]
m3 = 1; % [kg]
famp = 0.5; % [N]
scale = 0.01;
F0 = famp*scale; % [N]
alpha = 0.2;
beta = 0.15;
subs(As,{m,c,k,m1,m3,F0,alpha,beta},{m,c,k,m1,m3,F0,alpha,beta});

After substituting scalar values into As(s), As(s) still remains as:

Why isn’t MATLAB substituting the values I specified into As(s)?