Hi, I'm a stranger to OpenOffice from South Korea. I'm interested in the 
formula editor. I want to say that for the syntaces drawn invalid in the 
editor, some of them should be parsed as valid expressions.

1. [x,y) -- or (x,y]
These can be used to represent the harf-closed interval. 
(http://mathworld.wolfram.com/Half-ClosedInterval.html)

2. lbrace without closing rbrace
When you list two or more formulas that are related to each other, you probably 
want to stack{} and embrace them, but don't have to close the brace.

3. newline and = following after
A new-line character are prefered to be placed between a sequence of equality.

In other words the formula feature would be nice when the parser less strict.

Thank You,
Puzzlet.