Plotting CAS functions in function app

[retoa]

Hello !

Is there a way to directly plot functions obtained from CAS in the function app?

As an example, if I execute the CAS.tchebyshev(3) command in home to obtain a polynomial in X and copy the result in the function app, then it works.
When I insert CAS.tchebyshev(3) directly in the function app, it gives F1(X):NaN.

I took the Tchebyshev polynomials as an example, but it's the same for all functions you obtain from CAS command (fcoeff(),...).

reto