If 'P' denotes'×', 'T' denotes '-', 'M' denotes '+' and 'B' denotes '÷', then 12 P 6 M 15 T 16 B 4

70 83 5 110

83

12 P 6 M 15 T 16 B 4 = 12×6+15-16÷4 = 12×6+15-4 = 72+15-4 = 83