1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 + 11 + 12 + 13 + 14 + 15 + 16 + 17 + 18 + 19 + 20 + 21 + 22 + 23 + 24 + 25 + 26 + 27 + 28 + 29 + 30 = 465
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The sum of 2n, for n= 0 to 29.
2/3 + 1 + 3/5 - 3/10 = 59/30 or 1 and 29/30
1 + 30 + 2 + 3 + 5 + 6 + 10 + 15 = 72
11x + 29
2/3 + 3/10 = 29/30