Answer
$4e^x$
Work Step by Step
Even when x is raised to the 50th power, the $e^x$ function grows faster at infinity, so it will dominate.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.