QUES: He was sent to a university in Edinburgh however was staying there something completely different than the Darwin had expected

correct the punctuation.

CORRECTED: He was sent to a university in Edinburgh, however, was staying there something completely different than the Darwin had expected.

QUES: Each slide provides a clear explanation of a particular aspect of German grammar

correct the punctuation.

CORRECTED: Each slide provides a clear explanation of a particular aspect of German grammar.

QUES: On July 14th 1989 the monument was inaugurated during the 15th G7 summit at the occasion of the bicentenary of the French revolution

correct the punctuation.

CORRECTED:
On July 14th 1989, the monument was inaugurated during the 15th G7 summit at the occasion of the bicentenary of the French revolution.