F
i
n
d
t
h
e
p
r
o
d
u
c
t
:
(
a
-
b
-
c
)
(
a
2
+
b
2
+
c
2
+
a
b
+
a
c
-
b
c
)
Match the items on the right to the items on the left.
Check
OK
STEP1
STEP2
STEP3
STEP4
