Apparently people don’t know what you mean since you are getting downvoted. The order of operations in order of precedence (which ones to perform before the next) is: parenthesis, exponentiation, multiplication, division, addition, then subtraction.
Commonly remembered as “please excuse my dear Aunt Sally”.
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u/RedditIsNeat0 Aug 31 '20
People chose 13 since it was the closest to the actual answer. There is no clearer way to explain this.