Add punctuation: Europe has some 4000 higher education institutions with over 19 million students and 15 million staff
A: Europe has some 4,000 higher education institutions, with over 19 million students and 1.5 million staff.

Add punctuation: 1 year ago 0300 xHamster secretary office babe
A: 1 year ago 03:00 xHamster secretary, office, babe

Add punctuation: We distributed flyers various places like at the cultureday to recruit new participants
A:
We distributed flyers various places, like at the culture-day, to recruit new participants.