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611-4*{ 304-[68 + 4*(23*9-147/3)] /4 }=

Răspuns :

611-4x{304-[68+4x(207-49)]:4}=
611-4x[304-(68+4x160]:4=
611-4x[304-(68+640):4]=
611-4x(304-708:4)=
611-4x(304-177)=
611-4x127=
611-508=103