I need help very bad

What is 1/2 x (6 x 4)+3 + 2 show your work

Create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1.

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible