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468+248:8-[640:4+3×(81-68+19)]

Răspuns :

468+31-[160+3 X(13+19)]=
468+31-[160+3 X32]=
468+31-[160+96]=
499-256=
243
468+31-[160+3x(13+19)]=
499-(160+3x32)=
499-160+96=
499-256=243