b 20-[30-(712 - 14323927÷20203+1097)÷100]=

Răspuns :

[tex]20-[30-(712 - 14323927:20203+1097):100]= =20-[30-(712 - 709+1097):100] =20-[30-1100:100] =20-[30-11] =20-19 =1.[/tex]