I think MDAS is also followed when there are a bunch of operators between numbers. I guess 'select 6+2+-+7' became 1 happened in this manner:

• . 6+2+-+7 -> start
• 8-7 -> 7 and 2 are added to an implicit zero.
• 1 -> finally, subtraction

I think I could post a cute QOTD based on this, 'select 6+2+*-+7'?

My first guess is 1 if implicit zeros exists. Now let me start my 2005 and run the select...Hmm...Interesting. I had to do 'select 6+2+0*0-+7'. So implicit zeros do not exist, it's just a thing for add and sub operators.

Btw, I did not get the question right.