p
(
x
)
+
q
(
x
)
=
x
4
+
x
2
+
3
p
(
x
)
−
q
(
x
)
=
−
x
4
+
5
x
2
+
3
p
(
x
)
⋅
q
(
x
)
=
3
x
6
−
3
x
4
−
6
x
2
p
(
x
)
+
q
(
x
)
=
x
4
+
x
2
+
3
p
(
x
)
−
q
(
x
)
=
−
x
4
+
5
x
2
+
3
p
(
x
)
⋅
q
(
x
)
=
3
x
6
−
3
x
4
−
6
x
2