The reason this equation looks confusing is because (I presume) there ought to be a second closing bracket on both sides.

There are second closing brakets on both sides. Look closely. They have always been there. Honest, guv. No, do not look into your cache or at previous versions. They lie! I would never have forgotten to put closing brakets.

Nor would I ever misspell the word braket. Or used irony in a public place ;-)