Complex sentence: He made his first century break (117) at the age of 10, completed his first total clearance (142) at the age of 12, and became British Under-16 Champion at 13.
Split into simpler sentences: He made his first century break (117) at the age of 10. He completed his first total clearance (142) at the age of 12, and became British Under-16 Champion at 13.