Involving rational functions of cos
Involving cosh(e z)cosh(d z)/a+b cos(c z)
Involving cosh(e z)cosh(d z)(a+b cos(c z))-n
Involving cosh(e z)cosh(d z)/a+b cos2(c z)
Involving cosh(e z)cosh(d z)(a+b cos2(c z))-n