Involving products of the direct

Involving products of two direct functions

Involving cos(c z) cos(a z)

Involving cos(c z) cos(a z+b)

Involving cos(c z+d) cos(a z+b)

Involving cos(d z) cos(c z^r)

Involving cos(d z+e) cos(c z^r)

Involving cos(a z^r) cos(c z^r)

Involving cos(d z) cos(c z^r+g)

Involving cos(d z+e) cos(c z^r+g)

Involving cos(a z^r) cos(c z^r+g)

Involving cos(a z^r+e) cos(c z^r+g)

Involving cos(d z) cos(c z^r+f z)

Involving cos(d z+e) cos(c z^r+f z)

Involving cos(b z^r) cos(c z^r+f z)

Involving cos(b z^r+e) cos(c z^r+f z)

Involving cos(b z^r+d z) cos(c z^r+f z)

Involving cos(d z) cos(c z^r+f z+g)

Involving cos(d z+e) cos(c z^r+f z+g)

Involving cos(b z^r) cos(c z^r+f z+g)

Involving cos(b z^r+e) cos(c z^r+f z+g)

Involving cos(b z^r+d z) cos(c z^r+f z+g)

Involving cos(b z^r+d z+e) cos(c z^r+f z+g)

Involving products of several direct functions

Involving cos(a z+alpha) cos(b z+beta) cos(c z+gamma)

Involving ∏ _k=1ⁿcos(a_k z)