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∛a + ∛b² - (∛a - ∛b²) = ∛a + ∛b² - ∛a + ∛b² = 2∛b²
2 * 4^2 - 0.5 * (-2) + 6 = 2 * 16 + 1 + 6 = 32 + 1 + 6 = 39
<span>7·68+7·32 = 7·(68 + 32) = 7· 100 = 700
13·123-13·23</span> = 13·(123 - 23) = 13 · 100 = 1300