Răspuns :
72:9:2:2:2+5×2×8-3×3×3-2×3×9=
8:2:2:2+10×8-9×3-6×9=
4:2:2+80-27-42=
2:2+80-27-42=
1+80-27-42
81-27-42
54-42
12
8:2:2:2+10×8-9×3-6×9=
4:2:2+80-27-42=
2:2+80-27-42=
1+80-27-42
81-27-42
54-42
12