Complex sentence: The timespan of Daniel's 70th Week with its 30 day extension, appears to be marked out precisely by the Feast of Trumpets and the Day of Atonement seven years later for those seven year Tishrei to Tishrei timespans that see 86 and not 87 moons.
Split into simpler sentences: The timespan of Daniel's 70th Week with its 30 day extension, appears to be marked out precisely by the Feast of Trumpets and the Day of Atonement seven years later. This is for those seven year Tishrei to Tishrei timespans that see 86 and not 87 moons.