(
3x^2
-
____________________
)
=
9x^4
?
____________________
+
4
(
____________________
+
2y
)
=
16x^2
+
16xy
+
____________________
(
____________________
+
3n^2
)
=
25m^2
+
____________________
+
____________________
(
5n
-
2m
)
(
____________________
+
5n
)
=
____________________
-
____________________
(
____________________
+
y^3
)
(
x^2
-
____________________
)
=
____________________
-
y^
6
