Question

el resultado de (15-3)-[2-[5-(8-7+1)+6-2]+4]

Answer 1

(15-3)-(2-(5-(8-7+1)+6-2)+4) = 13

Answer 2

(15-3)-{2-[5-(8-7+1)+6-2]+4}=
12-{2-[5-2+6-2]+4}=
12-{2-7+4}=
12-(-1)=
12+1=
13