48÷2(9+3)
and
48
___
2(9+3)
Are the exact same same thing. There is nothing magical about the "÷" symbol that changes the answer from the same equation expressed vertically. The vertical expression is just easier to read, hence the erroneous 288's here.
http://en.wikibooks.org/wiki/Algebra/Order_of_Operations
You say the expressions are the same, yet you can not cite anything to say why. I cite, for the umpteenth time, the rules of how expressions are evaluated.
Is there some conspiracy to make incorrect rules easy to find and yet the correct rules nowhere on the internet?
Note, this page cited doesn’t just apply to how computers read things, it is the rules of math for everyone.