Bureaucrats, oversight, Administrators
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Line 1: − https://en.wikipedia.org/upload/b/bc/Wiki.png+ − This is a page to test history feature of Mediawiki+ − + − {{#widget:Picasa − |user=itfc.communications − |album=5685971214970516209 − |width=300 − |height=200 − |captions=1 − |autoplay=1 − |interval=5 − }} − − − {{#widget:YouTube|id=fLIC7i6Hhww}}
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\[
k_{n+1} = n^2 + k_n^2 - k_{n-1}
\]