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1)

(x + 2) (x + y + 3)

x^{2} + x y + 5 x + 2 y + 6

2)

(x - 4) (2 x + 3 y - 1)

2 x^{2} + 3 x y - 9 x - 12 y + 4

3)

(2 x + 1) (3 x - 2 y - 4)

6 x^{2} - 4 x y - 5 x - 2 y - 4

4)

(1 - x) (x + 3 x^{2} + 2 x^{3})

- 2 x^{4} - x^{3} - 4 x^{2} + x

5)

(- 3 - x) (- x + 2 x^{2} - 5 x^{3})

5 x^{4} + 13 x^{3} - 5 x^{2} + 3 x

6)

(1 - \frac{1}{2} x) (1 - 3 x + 12 x^{2})

- 6 x^{3} + \frac{27}{2} x^{2} - \frac{7}{2} x + 1

7)

(2 + \frac{2}{3} x) (1 - \frac{13}{3} x + \frac{28}{3} x^{2})

\frac{56}{9} x^{3} + \frac{142}{9} x^{2} - 8 x + 2

8)

(3 - \frac{3}{4} x) (1 - \frac{5}{7} x - \frac{64}{35} x^{2})

\frac{48}{35} x^{3} - \frac{99}{20} x^{2} - \frac{81}{28} x + 3