  Various thermodynamic quantities for baryon-free matter are calculated by
combining the most reliable non-perturbative and perturbative calculations,
especially the most recent ones including as many quark flavors as possible. We
extend these calculations by including other degrees of freedom (dof), such as
photons, neutrinos, leptons, electroweak particles, and Higgs bosons, that
allows us to consider the temperatures up to the TeV-scale. The calculations
show that similar to QCD, the EW phase transition is also a crossover. We have
found that while the equation of state for the hadronic matter is linear,
$p/\rho\simeq 0.2$, the one for higher temperatures is rather complex; it
exhibits two crossover-type phase transitions, corresponding to strong and EW
matter. At even larger energy densities, the deduced EoS becomes linear again
and close to ideal gas. The combined equation of state can be used for modeling
the expansion of the Universe from very early times and through the EW and QCD
era.
