Limits!!!!

It seems to me, that limits seem to the start of the end for me.
I'm still having trouble with limit problems like horizontal asymptotes. i think those are the ones you ca plug numbers in
also the simplifying to get the end behavior model i still don't know how to properly simplify :/it gets confusing
finally limits involving infinity. the problem with these is that i can't plug in numbers into this so i freeze on test, comme toujours :(

It seems math is starting to kill me!
let's hope i survive and limits don't end me!