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simplify -1/4 arccoth(1/4 sqrt(9x^2 + 16)) - 1/4 ln((sqrt(9x^2 + 16) - 4)/(3x))
simplify -1/4 arccoth(1/4 sqrt(9x^2 + 16)) - 1/4 ln((sqrt(9x^2 + 16) - 4)/(3x))
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