# Plotting the graph of a integral function [duplicate]

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.