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406-4*[3*(30-18:6:3)]=

Răspuns :

406-4x[3x(30-18:6:3)]=
=406-4x[3x(30-3:3)]=
=406-4x[3x(30-1)]=
=406-4x(3x29)=
=406-4x87=
=406-348=58
406-4[3x(30-18:6:3)]=
406-4x[3x(30-3:3)]=
406-4x[3x(30-1)]=
406-4x[3x29]=
406-4x87=
406-348=58