I would like to know how I can plot the graph of the following function in Latex or Tikz.
$f(t)=\frac{\int_{-\infty}^{t}\alpha(s)ds}{\int_{-2}^{-1}\alpha(s)ds}$,
where
$\alpha: \mathbb{R} \rightarrow \mathbb{R}$
is defined by,
e^{\frac{1}{(s+1)(s+2)}} in [-2,-1]
and zero outside of this interval.