To solve this, we first need to simplify both terms:

7 8/19 + 2 3/19 = 7 + 2 + 8/19 + 3/19 = 9 + 11/19 = 9 11/19

8 11/19 - 3 5/19 = 8 - 3 + 11/19 - 5/19 = 5 + 6/19 = 5 6/19

Now, we can subtract the simplified terms:

9 11/19 - 5 6/19 = 9 - 5 + 11/19 - 6/19 = 4 + 5/19 = 4 5/19

Therefore, $78/19+23/19$ - $811/19-35/19$ = 4 5/19.