Terms for subject Makarov containing don't matter

English	Russian
don't concern yourself with matters that are not your business	не суй свой нос не в свои дела
don't meddle in matters that don't concern you, mind your own business	не вмешивайся не в своё дело
don't take the matter seriously	не принимайте это дело всерьёз
don't take the matter too seriously	не принимайте это дело слишком всерьёз
I don't know what is the matter with me	я не знаю, что со мной