Let $a_n$ be the $n^{\text {th }}$ term of the series $5+8+14+23+35+$ $50+\ldots$ and $S_n=\sum_{k=1}^n a_k$. Then $S_{30}-a_{40}$ equal to [JEE Main 2023, 8 Apr (Shift 2)]

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Let \(a_n\) be the \(n^{\text {th }}\) term of the series \(5+8+14+23+35+\) \(50+\ldots\) and \(S_n=\sum_{k=1}^n a_k\). …

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