You do the brackets first so 3x8 = 24 - 7 = 17
You then do divide so 34/17 = 2
You then do the multiplication so 2x3= 6
Then you have 1-2-6 = - 7
The order you do it in is BIDMAS
B = brackets
I = indices
D = division
M = multiplication
A = addition
S = subtraction
So the answer is - 7