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I'm just trying to evaluate a series and would just appreciate if someone could either verify or correct me work.

Essentially, I have a series that I've produced:

-[(t^2)/2 + (t^5)/(2x5) + (t^8)/(2x5x8) + ...]

= - *sum from n = 0 to infinity* [(t^(3n+2))/(3n+2)!] = -e^t

Sorry for the poor syntax. I'm just in a slight rush here and can hopefully fix it up sooner rather than later. Regardless, i essentially get -e^t as my answer, and if someone could verify if this is correct, that would be very helpful. Thank you!

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# Summation Verification

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