Počtářská chvilka

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30 + 4 + 5 = 20 * (3 + 7) = 6 + 50 + 4 = 10 * (20 + 30) =
(30 + 4) * 5 = 20 * 3 + 7 = 6 * 50 + 4 = 10 * 20 + 30 =
30 + (4 * 5) = 20 + 3 + 7 = 6 + 50 * 4 = 10 + 20 + 30 =
30 * (4 + 5) = 20 + 3 * 7 = 6 * (50 + 4) = 10 + 20 * 30 =
30 * 4 + 5 = (20 + 3) * 7 = (6 + 50) * 4 = (10 + 20) * 30 =