60÷5(7-5) = ? Mathematician Explains The Correct Answer

What is 60÷5(7-5) = ? Everyone is arguing about this problem, so let's figure out the correct answer! The problem involves the order of operations, historical math notation, and binary expression trees. Glad to see the world is passionate about mathematics!

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*I get many, many emails about this problem and am unable to reply to them.

Here is a 1917 article from "The American Mathematical Monthly" that explains the usage of the division symbol as an exception to the order of operations
http://www.jstor.org/stable/2972726?seq=1#page_scan_tab_contents

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https://youtu.be/URcUvFIUIhQ

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