  We study several multiscale one-loop five-point families of Feynman
integrals. More specifically, we employ the Simplified Differential Equations
approach to obtain results in terms of Goncharov polylogarithms of up to
transcendental weight four for families with two and three massive external
legs and massless propagators, as well as with one massive internal line and up
to two massive external legs. This is the first time this computational
approach is applied to cases involving internal masses.
