Simplify the following text for a Grade 9 native English-speaking person.
Original: He published a `` Mathematical Preface '' to Henry Billingsley 's English translation of Euclid 's Elements in 1570 , arguing the central importance of mathematics and outlining mathematics ' influence on the other arts and sciences .
Simplified: He published a `` Mathematical Preface '' to Henry Billingsley 's English translation of Euclid 's Elements in 1570 . He wrote about how important mathematics was for the other arts and sciences .