What is the version of the following sentence with correct punctuation?

This relationship is what is known as Hubbles Law and dRdtR is known as Hubbles constant and denoted as H The dimension of H is inverse time and its reciprocal is about 144 billion years somewhat larger than the estimated age of the Universe as 138 billion years
This relationship is what is known as Hubble's Law and [(dR/dt)/R] is known as Hubble's constant and denoted as H. The dimension of H is inverse time and its reciprocal is about 14.4 billion years, somewhat larger than the estimated age of the Universe as 13.8 billion years.