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What comes next in the series 298,209,129,58,-4

What comes next in the series 298,209,129,58,-4
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What comes next in the series 298,209,129,58,-4

User Alexander Volkov
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\bf \begin{array}l term&value\\ \cline{1-2} &298\\ 298-89+9(0)&209\\ 209-89+9(1)&129\\ 129-89+9(2)&58\\ 58-89+9(3)&-4\\ -4-89+9(4)&\boxed{-57} \end{array}

User Potato
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