Equation of state and speed of sound of ( <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn>2</mml:mn><mml:mo>+</mml:mo><mml:mn>1</mml:mn></mml:mrow></mml:math> )-flavor QCD in strangeness-neutral matter at nonvanishing net baryon-number density

We update results on the QCD equation of state in (2+1)-flavor with non-zero conserved charge chemical potentials obtained from an eighth-order Taylor series. present for basic bulk thermodynamic observables strangeness-neutral strong-interaction matter, i.e. pressure, number densities, energy and entropy density, resum series using Pad\'e approximants. Furthermore, we calculate speed sound as well adiabatic compression factor matter lines constant per net baryon number. show that ($P(n_B), \epsilon (n_B)$) is already described by $4^{\rm th}$-order almost entire range temperatures accessible beam scan collider mode at Relativistic Heavy Ion Collider.