\(6 (-9 x - 3 y) = -54 x - 18 y\)

\(-4 (3 a + 6) = -12 a - 24\)

\(8 (-6 x - 4 y + 2) = -48 x - 32 y + 16\)

\(4 (-7 a - 6) - 2 (-8 a - 9) = -28 a - 24 + 16 a + 18 = -12 a - 6\)

\(3 p (4 p - 8) = 12 p^{2} - 24 p\)

\(4 + (5 p - 9) = 4 + 5 p - 9 = 5 p - 5\)

\(7 - (2 x + 4) = 7 - 2 x - 4 = -2 x + 3\)

\((4 a - 6) (3 b - 5) = 12 a b - 20 a - 18 b + 30\)

\((4 x + 3) (-2 x + 6) = -8 x^{2} + 24 x - 6 x + 18 = -8 x^{2} + 18 x + 18\)

\((a - 7) (a + 3) = a^{2} + 3 a - 7 a - 21 = a^{2} - 4 a - 21\)

\((-8 x + 5) + (-6 x - 4) = -8 x + 5 - 6 x - 4 = -14 x + 1\)

\((-8 p + 7) - (9 p - 4) = -8 p + 7 + -9 p + 4 = -17 p + 11\)

\((p - 3) (p - 4) (p + 7) = (p - 3) (p^{2} + 3 p - 28) = p^{3} + 3 p^{2} - 28 p - 3 p^{2} - 9 p + 84 = p^{3} - 37 p + 84\)

\(x (x + 9) (x + 7) = x (x^{2} + 16 x + 63) = x^{3} + 16 x^{2} + 63 x\)

\((a - 2)^{2} = a^{2} - 4 a + 4\)

\((-5 a + 3)^{2} = 25 a^{2} - 30 a + 9\)

\((-5 x + 3 y)^{2} = 25 x^{2} - 30 x y + 9 y^{2}\)

\((3 a - 7 b) (3 a + 7 b) = 9 a^{2} - 49 b^{2}\)

\((9 x + 5) (9 x - 5) = 81 x^{2} - 25\)

\((x - 2) (x + 2) = x^{2} - 4\)