Extent of Formulas Needed remember, question, complex, example, needed

hinsafdar

My question is in regard to the extent of formula memorization needed for the Lvl 1 exam. As an example, I've been working on the formula for sample kurtosis and its fairly complex to remember if I have to remember 100+ other formulas as well. Am I wasting time memorizing these formulas extensively? Or will I likely need them all?