@testset "6.2 Hyperbolic cosine" begin
    include("6.2.1 (c+d x)^m (a+b cosh)^n.jl")
    include("6.2.2 (e x)^m (a+b x^n)^p cosh.jl")
    include("6.2.3 (e x)^m (a+b cosh(c+d x^n))^p.jl")
    include("6.2.4 (d+e x)^m cosh(a+b x+c x^2)^n.jl")
    include("6.2.5 Hyperbolic cosine functions.jl")
    include("6.2.7 hyper^m (a+b cosh^n)^p.jl")
end
