Answer:
[tex] \boxed{ \bold{ \huge{ \boxed{ \sf{28}}}}}[/tex]
Step-by-step explanation:
Use BODMAS rule :
Bracket , Of , Division , Multiplication , Addition , Subtraction
[tex] \sf{2 \times [ 34 - 5 \times (3 + 1) ] }[/tex]
Add the numbers : 3 and 1
[tex] \dashrightarrow{ \sf{2 \times [ 34 - 5 \times 4 ] }}[/tex]
Multiply the numbers : 5 and 4
[tex] \dashrightarrow{ \sf{2 \times [ 34 - 20 \: ] }}[/tex]
Subtract 20 from 34
[tex] \dashrightarrow{ \sf{2 \times 14}}[/tex]
Multiply the numbers : 2 and 14
[tex] \dashrightarrow{ \sf{28}}[/tex]
Hope I helped!
Best regards! :D