Răspuns :
76+2×[405-816:(11-7)]-21:21=
=76+2x(405-816:4)-1
=76+2x(405-204)-1
=76+2x201-1
=477
=76+2x(405-816:4)-1
=76+2x(405-204)-1
=76+2x201-1
=477
76+2ori[405-816imparti[11-7]]--------76+2ori[405-816impartit4]-21impartit21------
76+2ori[405-204]-21impartit.21----76+2ori201-21impartit21----76+402-1-------477
76+2ori[405-204]-21impartit.21----76+2ori201-21impartit21----76+402-1-------477