How do you integrate e^(-st)f(t) in the Laplace transform definition?

[lostinhere]

This question may be obvious but I am stumped. I know the definition of a Laplace Transform is integration of e^(-st)f(t). However, I don't know how to integrate with both s and t variables included. If anyone could provide insight I would appreciated it.

 

[Tide]

The integration is only over the variable t and you treat s as a constant.

 

[lostinhere]

thanks, I knew it was simple