How do i factor (x^2+4)^3/2 - x^2(x^2+4)^-1/2 ?

The monetary value earned for selling goods or services to customers is called a.) revenue b.) assets c.) money d.) accounting

Asap! i'm not good math and i'm lost.

If you are dealt 4 cards from a shuffled deck of 52? cards, find the probability that all 4 cards are diamondsdiamonds.