Involving csc-1(z2/z2+c1/2)
Involving csc-1(z2/z2-11/2) and cosh-1(1/z)
Involving csc-1(z2/z2+11/2) and cosh-1(1+2 z-2)
Involving csc-1(z2/z2+11/2) and cosh-1((z-2+1)1/2)
