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180:2+[(50x2:10+90)+10]-25x4

Răspuns :

180:2+[(50x2:10+90)+10]-25x4 =
= 90+[(100:10+90)+10]-100 =
= 90+[(10+90)+10]-100 =
= 90+(100+10)-100 =
= 90+110-100 =
= 200-100 =
= 100