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1000x [50-(78:6+70:10)x2]:100

Răspuns :

1000 x [50-(78:6+70:10)x2]:100
1000 x (50 - 13 + 7 x 2) :100
1000 x 37 + 14 : 100 
37000 + 14 : 100
51000 :100
510