Simplify the following text for a Grade 10 native English-speaking person.
Original: Khondaker Moshtaq Ahmad ( also spelled Khandakar Mushtaq Ahmed and phonetically spelt Khondokar Mushtak Ahmed ) ( 1918 â `` March 5 , 1996 ) was a Bangladeshi politician who served as the President of Bangladesh from 15 August to 6 November 1975 after the assassination of Sheikh Mujibur Rahman , the founding leader of Bangladesh .
Simplified: Khondaker Moshtaq Ahmad ( 1918 - March 5 , 1996 ) was a Bangladeshi politician who served as the President of Bangladesh .