Integrate[(A + B Coth[z])/(a + b Coth[z])^2, z] == ((A + B Coth[z]) Csch[z] (b Cosh[z] + a Sinh[z]) (((a^2 A + A b^2 - 2 a b B) z (b Cosh[z] + a Sinh[z]))/ ((a - b)^2 (a + b)^2) + ((-2 a A b + a^2 B + b^2 B) Log[b Cosh[z] + a Sinh[z]] (b Cosh[z] + a Sinh[z]))/(a^2 - b^2)^2 + (A b Sinh[z] - a B Sinh[z])/(a^2 - b^2)))/ ((a + b Coth[z])^2 (B Cosh[z] + A Sinh[z]))

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2002-12-18