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90-6*7+(100-75)=

3*8+7*7-6*6=

100-(3*6+5*9)=


Răspuns :

1) 90-6*7+(100-75)=90-42+25=73
2) 3*8+7*7-6*6=24+49-36=37
3) 100-(3*6+5*9)=100-(18+45)=100-63=37