4). (2 points each) Evaluate these expressions for:
a = 4, b = 3, c = 2
Rewrite the expressions with numbers first.

a). a - b =	b). b - a =
c). abc =	d). (ab)/c =
e). (a + b)c =	f). a + (bc) =

5). (2 points each) Evaluate these expressions for:
a = +3, b = -4, c = +9


a).

b). bc/a

c). a - b


d). acb


e). 4b - c


f). 6a + 4b


g).


h). (a + b) c