If you're studying calculus it's expected you can do this. And do it easily.
I suggest you extensively revise basic algebra, index laws etc. if you hope to successfully tackle the sort of calculus questions you're going to get given n the coming days and weeks.
I imagine you're right about needing to review. I haven't taken any classes in 5 years now I find myself in this nightmare situation. Thank you for your explanation though - it did clear it up for me and now in retrospect it does seem kind of obvious.