I
d
e
n
t
i
f
y
t
h
e
d
e
g
r
e
e
o
f
t
h
e
e
x
p
r
e
s
s
i
o
n
:
2
a
3
b
c
+
3
a
3
b
+
3
a
3
c
-
2
a
2
b
2
c
2
Matching exercise
Match the items on the right to the items on the left.
Check
OK
STEP1
STEP2
STEP3
STEP4
