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180:2+[{50×2:10+90}+10-25×4]

Răspuns :

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