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calculati {7+7×[7+3×(5+225:15-15)]}-161

Răspuns :

{7+7×[7+3×(5+225:15-15)]}-161=
{7+7×[7+3×(5+15-15)]}-161=
[7+7×(7+3×5)]-161=
[7+7×(7+15)]-161=
(7+7×22)-161=
(7+154)-161=

161-161=

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