X+(67-y)+(83-(52+z)) при х=15 y=19 z=12

Question

X+(67-y)+(83-(52+z)) при х=15 y=19 z=12

Answer 1

15+(67-19)+(83-(52+12))=82
67-19=48      
52+12=64
83-64=19
15+48+19=82