you should create a Venn diagram to represent your information.Then after putting your information in correctly. For a) you'll add all the numbers in the Venn diagram including 2, which is outside the Venn diagram,then you'll get 29.. Subtract 29 from 50
1: if you see something to the power you will always think of repeated multiplication off the bat. so you just multiply the coefficient by the amount of the exponent.