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The sum is 194
45+92-56*2 = 45+92-112 = 25
(25 +21) * 2 = 92 25 + (21 * 2) = 67
Assuming the series is 1 + 3 + 5 + ... + 25, the answer is 169.
3 + 19 + 25 + 307 = 354