A same meaning or not problem:
It was originally developed by groups of Chinese scholars in the Soviet Union , used by Chinese and Russian immigrants there until the majority of them left the country .
It was originally developed by groups of Chinese and Russian scholars in the Soviet Union , and used by Chinese immigrants there until most of them left the country .
****
[A]: no

A same meaning or not problem:
In 1997 , he founded Equicore Beteiligungs GmbH and co-founded Freiburger Vermogensmanagement GmbH in 1998 .
In 1997 he founded Equicore Beteiligungs GmbH and founded Freiburger Vermogensmanagement GmbH in 1998 .
****
[A]: yes

A same meaning or not problem:
The new vice rector Jurgen Willer was elected as former rector of Danube University Krems .
The new vice rector Jurgen Willer was elected as former rector of the Danube University Krems .
****
[A]: yes

A same meaning or not problem:
She studied composition with David Lumsdaine and was strongly influenced by her study of the Australian composer Alexander Goehr .
She studied composition with David Lumsdaine and was strongly influenced by her studies of the Australian composer Alexander Goehr .
****
[A]:
yes