1.	Simplify .
		A.		B.	7
		C.		D.
		Hint
	2.	Simplify .
		A.		B.
		C.		D.
		Hint
	3.	Simplify .
		A.		B.
		C.	The expression is in simplest form.	D.
		Hint
	4.	Simplify .
		A.		B.
		C.	The expression is in simplest form	D.
		Hint
	5.	Find .
		A.		B.
		C.		D.
		Hint