19+33=52
9 + (-4) = 5 (5) + 9 = 14 14 + (5) = 19 (19) + 14 = 33 33 + (19) = [52].
Find the number that comes next in the following series:
3, 7, 12, 14, 16, 19, 21, 25, 30, 41, 45, 52, 54, 56, 59, 61, 65, 70, ?