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Ah, but the whole damn thing's in a bracket. Brackets come before addition(which, yes, comes before subtraction.)

First, you do the 2 x -3. You end up with 10 - {6-3}. Not very hard to guess what happens after that.
 
No, wait. I really hope you're thinking I tried to justify his post. I'm not, I made my own new post.

Now, if you're thinking that my new post, when taken individually, gives a number other than 1....>>