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!

I studied Mathematics and Economics at Stanford. Press coverage of my work:
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0:00 Order of operations
2:06 Historical usage
4:40 Binary trees

*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/29....72726?seq=1#page_sca

Google evaluation
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What is 6÷2(1+2) = ? The Correct Answer Explained
https://youtu.be/URcUvFIUIhQ

9 - 3 ÷ 1/3 + 1 = ? The Correct Answer (Viral Problem In Japan)
https://youtu.be/07Abat5iBbw

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