I completely forgot everything about asympotes and I received some homework with these 2 questions:

Find the horizontal asymptotes of each:

1. y = [(x^2) - (6x^4)]/(3x^4) + 8

2. y = tan^-1(e^x)

Any help would be much appreciated. I'm not looking for direct answers, I need to learn how to do this, so if you can please show the steps involved that would be great.

Thanks