Entering partial derivatives?

[Han]

You can always create an "alias" program file that shortens built-in commands to shorter commands.

For example:

EXPORT SS(a,b):=
BEGIN
return subst(a,b);
END;

Place all your "macros" in the same file, and they will also appear in the Toobox (under User, next to the Catalog) so you can get there with just a few screen taps.

Now, you can just type:

SS(diff(x^2*y+x*y^2,x),{x=1,y=2});