172-{45:5+[180-72:8×(240:12-15

Răspuns :

172-{45:5+[180-72:8×(240:12-15)]}=
=172-{9+[180-9×(20-15)]}=
=172-[9+(180-9×5)]=
=172-[9+(180-45)]=
=172-(9+125)=
=172-134=
=38