Răspuns:
80+[36-(72:8+4)]=80+[36-(9+4]
=80+(36-13)
=80+23=103
200-[100:10+(96-48+7)]=200-[10+(48+7)]
=200-(10+55)
=200-65=135
693+300:10-[76+(393-309)]=693+30-(76+84)
=693+30-124
=723-124=599
[(6:6+4):5+9]×222=[(1+4):5+9]×222
=(5:5+9)×222
=(1+9)×222
=10×222=2220