I didn't get number four. But there's another answer to number two, possibly.
5 + 5 + 5 ≠ 550
On Number four you use the form itself and one side of the box for the answer as one piece of the rectangle, that way you have to only use three lines to create the rectangle... The do not equal sign is for number 2. The other two it looks like you got right. I'm sure they'd accept something that seemed logical like MTWTWTM as well...
To whom are you talking? Anyway do you think that arguing with the mental hospital staff about the answers will get you out?