27 - log³₂ b³ = (3 - log₂b³)(9 + 3log₂b³ + log²₂b³) = (3 - 3log₂b)(9 + 3*3log₂b + 3log²₂b) = 3*3(1 - log²₂b)(3 + 3log₂b + log²₂b) = 9(1 - log₂b)(3 + 3log₂b + log²₂b)
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27 - log³₂ b³ = (3 - log₂b³)(9 + 3log₂b³ + log²₂b³) = (3 - 3log₂b)(9 + 3*3log₂b + 3log²₂b) = 3*3(1 - log²₂b)(3 + 3log₂b + log²₂b) = 9(1 - log₂b)(3 + 3log₂b + log²₂b)