Simplify the following text for a Grade 11 native English-speaking person.
Original: Later at its height , gradually added , were the annexed princely states of Uttar Pradesh , Uttarakhand , Punjab in India , Haryana , and Himachal Pradesh and portions of Chhatisgarh , Madhya Pradesh , and Maharashtra in present day India , including the provinces of North West Frontier and Punjab in Pakistan , and Burma ( present day Myanmar ) .
Simplified: The areas of India that used to be part of the presidency include , Uttar Pradesh , Uttarakhand , Punjab , Haryana , and Himachal Pradesh as well as parts of Chhatisgarh , Madhya Pradesh , and Maharashtra . It also included the North-West Frontier and British Punjab provinces of Pakistan as well as Burma .