In this task you will be given a list of integers. You should only return an integer if the first digit is the same as the last digit in the number. If an integer has a single digit, then it should be returned. If there are no integers that start and end with the same digit then an empty list ("[]") should be returned.
[639, -745, -31, -609, 17, 524, 492, -111, -3, 145, -71, -269, -15, 513, -270, -79, -719, -672, 461, -933, 712, -399, -391, -570]