Involving sech-1(z)
Involving sech-1(z) and cos-1(1/z)
Involving sech-1(z) and cos-1(z2-2/z2)
Involving sech-1(z) and cos-1(2-z2/z2)
Involving sech-1(z) and cos-1((z+1)1/2/(2z)1/2)
Involving sech-1(z) and cos-1((-1-z)1/2/(-2z)1/2)
Involving sech-1(z) and cos-1(z+1/2z1/2)
Involving sech-1(z) and cos-1((z-1)1/2/(2z)1/2)
Involving sech-1(z) and cos-1((1-z)1/2/(-2z)1/2)
Involving sech-1(z) and cos-1(z-1/2z1/2)
Involving sech-1(z) and cos-1(1/(z2)1/2)
Involving sech-1(z) and cos-1(1/z21/2)
Involving sech-1(z) and cos-1((z2-1)1/2/z)
Involving sech-1(z) and cos-1((z2-1)1/2/(z2)1/2)
Involving sech-1(z) and cos-1((1-z2)1/2/(-z2)1/2)
Involving sech-1(z) and cos-1(z2-1/z21/2)
Involving sech-1(z) and cos-1(2(z2-1)1/2/z2)
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