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They aren't tedious until you try to do large matrices where you need to use ellipses and other things inside.

Also Latex notation for even simple things like paretheses sucks. \left( and \right) ? wtf? why not just \( and \)? the left and right is redundant. Stuff like that makes it unpleasant to use.

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They do different things, ( and ) work just fine, but they are standard sized, while \left( and \right) adapt to the size of what's inside. It's kinda uncomfortable to write, but I guess it is done this way because the \left and \right commands can take a lot of different arguments

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