Add punctuation: The book follows a pair of childhood friends Patrica and Laurence who hadn t expected to reunite as adults
A: The book follows a pair of childhood friends, Patrica and Laurence, who hadna t expected to reunite as adults.

Add punctuation: A machine that operates problemfree for a long time and that has a high secondhand value is cheaper to own
A: A machine that operates problem-free for a long time and that has a high second-hand value is cheaper to own.

Add punctuation: Swivel caster with brake 125mm Vulcanized elastic rubber tires 200KG
A:
Swivel caster with brake, 125mm, Vulcanized elastic rubber tires, 200KG