Expand the following products
(x + 1) (x + 9)
=
x2 + x +
(x + 4) (x + 4)
=
x2 + x +
(x + 3) (x + 2)
=
x2 + x +
(x + 5) (x + 9)
=
x2 + x +
(x + 9) (x + 8)
=
x2 + x +
(x + 5) (x + 4)
=
x2 + x +
(x + 7) (x + 2)
=
x2 + x +
(x + 4) (x + 4)
=
x2 + x +
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