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.
[-599, -707, 890, -657, 117, -21, -86, 970, 507, -297, 79, -621, 200, -709, 904, -814, -594, -460, 796, -661]