Variable use between CAS and Home.

[webmasterpdx]

Han, I was reading this post out of curiosity and tried your F1 example.
On CAS I tried to factor x^2+4*x-5
Then, I went to the home screen and did what you suggested and typed:
F1:=x->
...and copied the quadratic from CAS to get:
F1:=x->x^2+4*x-5
...and it gives me Error:Syntax Error
What am I doing wrong here?
Thx
-Donald