Răspuns :
= {17+[2+(47+23):5]:8}-2
=[17+(2+70:5):8]-2
=[17+(2+14):8]-2
=(17+16:8)-2
=(17+2)-2
=19-2
= 17
=[17+(2+70:5):8]-2
=[17+(2+14):8]-2
=(17+16:8)-2
=(17+2)-2
=19-2
= 17