3: This type of series does not look close to geometris series and it cannot be rewritten as a sum of differences, so the telescopis series approach is also not possible. It remains to try the power series approach. Since there are series with factorials in denominator, there is a hope that it might work. First try to rewrite the terms of the series into the form a_kq^k, where a_k does not include any powers with k in the exponent, by gathering all powers that do into one.

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