Complex sentence: There are many ideas and theses who and what are the Macedonians the thrutfull is that the Macedonians are nation formed from the mixing of the Ancient Macedonians and the Slavs who have came on the Balkans in the 7th century.
Split into simpler sentences: There are many ideas and theses who and what are the Macedonians. The truth is that the Macedonians are a nation formed from the mixing of the Ancient Macedonians and the Slavs who have come to the Balkans in the 7th century.