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maybe Im wrong but this is what I get

7+ 7/7 + 7x7 - 7
7+ [(7/7) + (7x7 )] - 7
7 + [1 + 49] - 7
50

As I learned the "Order of Operation" in Mathematics

It is BODMAS

BODMAS meaning Brackets, Of or Order, Division, Multiplication, Addition and Subtraction.

So the correct answer must be -

7+{7/7}+7x7-7
7+1+{7x7}-7
8+49-7
57-7
=50

So You are absolutely right @diggeri

bravo @diggeri

maybe Im wrong but this is what I get
7+ 7/7 + 7x7 - 7
7+ [(7/7) + (7x7 )] - 7
7 + [1 + 49] - 7
50