Math wizards please help me with the following sequences. I am having a real hard time finding the patterns. Please send your answers or queries to my PM.

(1) 0, 5, -3, 5, -3,__, 4, 3, 8, -4, 1, 3,__, 7, 9, 6,__, 8, 2, 3, 3, 5, 4, 7, 9

(2) 1626, 06812,__, 0724127211,__

(3) 100, 120000, 132000000,__, 15403020000000,__

Here is another sequence much easier than the above sequences but beautiful ;

3, 8, 13, 18, 23, 28, 30, 31,__ (Hint ; nothing to do with math)

Thanks in advance.

Colin