Input:
Gamma(n,x)
Write:
`Gamma(n,x)`
Output:
$$definition(\Gamma (n,x))== exp((-x))\ \Gamma (n)\ (\sum _{k=0} ^ {-1+n} \frac {{x}^{k}}{(k)!})$$
Result: $$exp((-x))\ \Gamma (n)\ (\sum _{k=0} ^ {-1+n} \frac {{x}^{k}}{(k)!})$$
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