Răspuns :
1312-9*6+72/8=a
a-278=b
1312-54+9=a
a=1258+9
a=1267
a-278=b
1267-278=b
b=1267-278
b=989
a-278=b
1312-54+9=a
a=1258+9
a=1267
a-278=b
1267-278=b
b=1267-278
b=989