  We use hexagonalization to compute four-point correlation functions of long
BPS operators with special R-charge polarizations. We perform the computation
at weak coupling and show that at any loop order our correlators can be
expressed in terms of single-valued polylogarithms with uniform maximal
transcendentality. As a check of our results we extract nine-loop OPE data and
compare it against sum rules of (squared) structures constants of non-protected
exchanged operators described by hundreds of Bethe solutions.
