Hi, I am a computer engineering student and Maths is one of my subject for this university year.

I was solving some paper and I cant figure out how to solve the following step. (Its based on Linear Differential Equations.)

This is the step I am stuck at,

$\displaystyle

e^{-2x} e^{e^{2x}}

$

The answer of this step is

$\displaystyle

e^{4x}

$

How?