14. Поставь знаки арифметических действий и скобки, где это необходимо.
70 2 O 7 = 7
15 O3O5 = 0
20 C4О6 = 86
4 O3 + 7 = 19
18O3O2 = 12
287 O2 = 2
(2 km 4-4
506O4 = 120
4004O7 = 70​
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