/ 2 \
\polygamma (0, 3 + x) + polygamma(1, 3 + x)/*gamma(3 + x)
$$\left(\operatorname{polygamma}^{2}{\left (0,x + 3 \right )} + \operatorname{polygamma}{\left (1,x + 3 \right )}\right) \Gamma{\left(x + 3 \right)}$$
/ 3 \
\polygamma (0, 3 + x) + 3*polygamma(0, 3 + x)*polygamma(1, 3 + x) + polygamma(2, 3 + x)/*gamma(3 + x)
$$\left(\operatorname{polygamma}^{3}{\left (0,x + 3 \right )} + 3 \operatorname{polygamma}{\left (0,x + 3 \right )} \operatorname{polygamma}{\left (1,x + 3 \right )} + \operatorname{polygamma}{\left (2,x + 3 \right )}\right) \Gamma{\left(x + 3 \right)}$$