\(2 (5 x - 3 y) = 10 x - 6 y\)

\(9 (2 p + 8) = 18 p + 72\)

\(-2 (3 a - 5 b + 8) = -6 a + 10 b - 16\)

\(3 (2 x - 7) + 4 (5 x - 8) = 6 x - 21 + 20 x - 32 = 26 x - 53\)

\(-9 a (-2 a + 5) = 18 a^{2} - 45 a\)

\(5 + (4 x + 3) = 5 + 4 x + 3 = 4 x + 8\)

\(-9 - (6 a - 4) = -9 - 6 a + 4 = -6 a - 5\)

\((-8 a + 3) (2 b - 5) = -16 a b + 40 a + 6 b - 15\)

\((-2 p - 7) (3 p + 6) = -6 p^{2} - 12 p - 21 p - 42 = -6 p^{2} - 33 p - 42\)

\((x - 3) (x + 9) = x^{2} + 9 x - 3 x - 27 = x^{2} + 6 x - 27\)

\((-8 p - 2) + (3 p - 7) = -8 p - 2 + 3 p - 7 = -5 p - 9\)

\((-7 a + 2) - (9 a + 5) = -7 a + 2 + -9 a - 5 = -16 a - 3\)

\((p - 2) (p + 4) (p + 7) = (p - 2) (p^{2} + 11 p + 28) = p^{3} + 11 p^{2} + 28 p - 2 p^{2} - 22 p - 56 = p^{3} + 9 p^{2} + 6 p - 56\)

\(x (x - 6) (x - 7) = x (x^{2} - 13 x + 42) = x^{3} - 13 x^{2} + 42 x\)

\((a + 3)^{2} = a^{2} + 6 a + 9\)

\((-6 a + 5)^{2} = 36 a^{2} - 60 a + 25\)

\((-3 x - 4 y)^{2} = 9 x^{2} + 24 x y + 16 y^{2}\)

\((-9 x - 8 y) (-9 x + 8 y) = 81 x^{2} - 64 y^{2}\)

\((-8 a + 5) (-8 a - 5) = 64 a^{2} - 25\)

\((a - 8) (a + 8) = a^{2} - 64\)