Simplify the following expression using trigonometric identities. Your final answer must be a single trigonometric function of x, possibly with a whole number coefficient and/or a constant added to (or subtracted from) it. For example, the answer could look similar to 2 sin(x) – 1, sec(x), or 5 tan(x). (1+ sin z)(sec z – tan z) =

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A:     ∫1e8t2lntdt=8·∫1et2lntdt=813t3lnt-3·∫t23dt1e=813t3lnt-3·t391e=813t3lnt-t331e=82e39+19=82e3+19