how can i do to use laplace transformation result into tf?

this is my code.

syms x t y z c T; G=T*diff(y)+y; U=laplace(G) sys=tf(U) t=0:.1:20; % time f=200; % frequency omega = 2*pi*f; % rad/s u=sin(omega*t); % input : harmonic function - sin(wt) to lsim(sys,u,t) % Check

when i run this code, the number of line 4 has error that order 'tf' run only numerical matrixs. I have known order tf. but, I want to use laplace transformation result directly. How can i do?

[Azzi Abdelmalek]

I have known order tf: what does that mean?