Text: remember to click "update cart" if you change the number of items.

Correct capitalization: Remember to click "Update cart" if you change the number of items.

Text: the portrait of an eccentric.

Correct capitalization: The portrait of an eccentric.

Text: fredag d. 24. september 1993

Correct capitalization: Fredag d. 24. September 1993

Text: you can embed or link your diagram.

Correct capitalization:
You can embed or link your diagram.