4 x 3 = ?, 2000/4 = ?, 150/3 = ?, 20 x 3 =?, 12 - 3 = ?, 1000 - 300 = ?, 15 + 7 = ?, 32 + 7 = ?, 14 + 40 = ?, 30 - 13 = ?, 5 - 50 = ?, 90 + 9 = ?.

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