 Finally, we use our results to show how the output of delay differential equation models can be approximated with the use of simple expressions involving the incomplete gamma function .
<clarity>  Finally, we use our results to show how the output of delay differential equation models can be approximated with the use of simple expressions involving the incomplete gamma function .
 Finally, we show how the output of delay differential equation models can be approximated with the use of simple expressions involving the incomplete gamma function .