# Order of Operations

I thought addition came before subtraction. Also, how do you know where to put parentheses when there are none in the equation already? Surprisingly, I think that Order of Operations is one of the hardest things I have learned in math ( I can do way harder math, but not even this!!). I need to understand every single rule about order of operations, so I will not mess up equations a a higher level just because of an order issue.

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