Sums involving the direct function
Involving log(z)
Involving sin^{1}(z)
Involving cos^{1}(z)
Involving tan^{1}(z)
Involving cot^{1}(z)
Involving csc^{1}(z)
Involving sec^{1}(z)
Involving sinh^{1}(z)
Involving cosh^{1}(z)
Involving tanh^{1}(z)
Involving csch^{1}(z)
Involving sech^{1}(z)
