Different Back Surgeries - Sports Center

#1 Hello, 1. I like to work with people of/with different ages. 2.

I like to work with people of /from different cultures. 3. I like to work with people of/with/from different backgrounds. 4.

different back surgeries, I like to work with people of/with/from different occupations. I am confused about the prepositions in my 4 sentences. Are all these ... There are some discussions here: Of/with/from different background. But it is not exactly what I am looking for.

different back surgeries, I am wondering which of the following is correct: (a) I've been working with people with different backgrounds. (b) I've been working with people from different backgrounds. (c)... Seacoastonline.com: Health Wellness: Back surgery rarely the answer. Here’s what to know The number of times this week I have heard people talk excitedly about their upcoming back surgery has left me genuinely disheartened. Not because surgery never has a place - but because it highlights ...

It was "They had to change TV channels on different days at different times". I read "in different days" could be correct too, I don't know. Thank you in advance for your help too. Which one of the following is correct in the following context?