Add punctuation: In the following year he left his chair of physics at the cole Polytechnique and accepted a post at the Sorbonne in mathematical physics and probability 
A: In the following year he left his chair of physics at the École Polytechnique and accepted a post at the Sorbonne in mathematical physics and probability .

Add punctuation: Course Doing business in PERU Lima
A: Course: Doing business in PERU Lima

Add punctuation:  The Second World War was in some ways a continuation of the First World War
A:
* The Second World War was in some ways a continuation of the First World War.