QUES: Heres some tutorial videos that can help you Buttonhole smaller

correct the punctuation.

CORRECTED: Here's some tutorial videos that can help you! Buttonhole - smaller

QUES: This old city with its pagodas offers a rich architecture built at the bank of the Ayeyarwaddy Irrawaddy river

correct the punctuation.

CORRECTED: This old city with its pagodas offers a rich architecture built at the bank of the Ayeyarwaddy (Irrawaddy) river.

QUES: United States Car Rental Guide is part of Ecommerce Group LTD one of the largest independent travel brokers

correct the punctuation.

CORRECTED:
United States Car Rental Guide is part of Ecommerce Group LTD; one of the largest independent travel brokers.