Question

{37+99-5×9-[7÷(6+1÷1)]-17}-33

Answer 1

{37+99-45-[7:(6+1)]-17}-33=
[37+99-45-(7:7)-17]-33=
(37+99-45-1-17)-33=
73-33=40

Answer 2

{37+99-45-[7:(6+1)]-17}-33=40
{37+99-45-[7:7]-17}-33=
{37+99-45-1-17}-33=
73-33=
40