Symb syntax error when pasting from command screen

[Han]

The lower case x in the CAS view is not the same as the upper case X used by the Function app. When typing in an expression, the Function app expects the formula to use upper case X because it uses the upper case X for its dummy variable. What you can do, however, is use the CAS view to use:

F1:=(x) -> x^2;

The -> is supposed to be the right arrow on the calculator. This stores a function (as opposed to an expression) into F1. The Function app then creates a proper expression from this function using its preferred dummy variable X (upper case).

Mathematical functions in the CAS view are created using the ( variables ) -> expression syntax. For example, a two-variable function can be created using:

f:=(x,y) -> x^2+y^2

and typing f(1,2) would produce 5 and typing f(a,b) would produce a^2+b^2 (in the CAS view).