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http://functions.wolfram.com/01.07.21.2281.01
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Integrate[1/(a Sin[e z]^2 + b Sin[2 e z] + c Cos[e z]^2)^2, z] ==
(-(1/(2 e))) (((a + c) ArcTan[(-b - a Tan[e z])/Sqrt[-b^2 + a c]])/
(-b^2 + a c)^(3/2) - (2 b (a + c) + (a^2 + 4 b^2 - 2 a c + c^2)
Sin[2 e z])/((a - c) (-b^2 + a c) (a + c + (-a + c) Cos[2 e z] +
2 b Sin[2 e z])))
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Date Added to functions.wolfram.com (modification date)
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){kind=small}
