F
i
n
d
t
h
e
v
a
l
u
e
o
f
w
,
g
i
v
e
n
t
h
a
t
x
=
4
,
y
=
4
,
z
=
-
2
a
n
d
w
=
x
2
-
y
2
+
z
2
-
x
y
z
.
Matching exercise
Match the items on the right to the items on the left.
Check
OK
STEP1
STEP2
STEP3
STEP4
STEP5
