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
UPVOTED by @phenombot