$$
\int\dbar Dl \frac{1}{(l^2+\Delta)^n} = \frac{1}{(4\pi)^{D/2}}\frac{\Gamma(n-D/2)}{\Gamma(n)}\left(\frac{1}{\Delta}\right)^{n-D/2}
$$
$$
\int \dbar Dl \frac{l^2}{(l^2+\Delta)^n} = \frac{D/2}{(4\pi)^{D/2}}\frac{\Gamma(n-1-D/2)}{\Gamma(n)}\left(\frac{1}{\Delta}\right)^{n-1-D/2}
$$
$$
\int \dbar Dl \frac{l^4}{(l^2+\Delta)^n} = \frac{(D/2)(1+D/2)}{(4\pi)^{D/2}}\frac{\Gamma(n-2-D/2)}{\Gamma(n)}\left(\frac{1}{\Delta}\right)^{n-2-D/2}
$$
$$
\Gamma(x\to -n) = \frac{(-1)^n}{n!}\left(\frac{1}{x+n}-\gamma+1+\cdots+\frac{1}{n}+O (x+n)\right)
$$