Complex sentence: Iran plans to invest $15 billion a year to expand its annual gas output capacity to 300 billion cubic meters in 2014, from 170 billion in 2009 and $50 billion from 2010 until 2020 on LNG projects.
Split into simpler sentences: Iran plans to invest $15 billion a year to expand its annual gas output capacity to 300 billion cubic meters in 2014, from 170 billion in 2009. It will invest $50 billion from 2010 until 2020 on LNG projects.