I suppose test #1 is like this:
...
(*my commentary*)(*
 my commentary with end of line*)
(*(*my comment with two open brackets *)
(12+13=45)
(34+56
)
...
I think the first test is checking how can you work with EndOfLine symbol. It is allowed to be in any commentary and in any arithmetic expression. But if you change EndOfLine with whitespace (' '), remember, that ' ' is not allowed in an arithmetic expression!
P.S. I replaced EndOfLine with '$' symbol and got AC.

Edited by author 15.07.2009 17:24

thx I didn't really think about that :)
> replaced EndOfLine with '$' symbol
why would you do that? that's a stupid patch - you've just got lucky with your AC; it wouldn't pass if one of the expressions contained the actual '$' :)
i just processed 0x0d and 0x0a as usual expression symbols