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calculeaza, respectand ordinea efectuarii operatiilor:

(720÷8+54)-17×3=

1 799+[3×(127+546÷2)+27÷3]=

12 700-[176×6-438÷3+(2+2×2)]=

[3 000-3×(366÷3)+7 899]-2 005=

2×[(0÷90+90÷50)+123÷3-10]+999÷9×3=