Complex sentence: The Sun will then become a white dwarf star, radiating 1e15 Watts that sustains 1e13 kg biomass for an immense hundred million trillion (1e20) years, contributing a time-integrated BIOTA of 1e33 years.
Split into simpler sentences: The Sun will then become a white dwarf star, radiating 1e15 Watts of energy. It can provide power to 1e13 kg biomass for the immense life-span of a hundred million trillion (1e20) years, contributing a time-integrated BIOTA of 1e33 years.