What number is missing from this series?5 7 12 19 31 ( )

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What number is missing from this series?5 7 12 19 31 ( )
x) H,Q+MJ-R,V,.KWH+U(eۛ*+)Z**h(h$; `jcճ^6}6c';@Dk~qAbN Y

What number is missing from this series?5 7 12 19 31 ( )
What number is missing from this series?
5 7 12 19 31 ( )

What number is missing from this series?5 7 12 19 31 ( )
50
每个数都是前两个数相加.