\(5 (-6 a - 4 b) = -30 a - 20 b\)

\(4 + (9 a + 2) = 4 + 9 a + 2 = 9 a + 6\)

\(-6 - (-2 p - 3) = -6 + 2 p + 3 = 2 p - 3\)

\(7 (-9 x - 5) = -63 x - 35\)

\(2 (-5 x + 9) + 4 (3 x + 8) = -10 x + 18 + 12 x + 32 = 2 x + 50\)

\(7 p (6 p - 2) = 42 p^{2} - 14 p\)

\((-5 a + 3) + (-4 a + 8) = -5 a + 3 - 4 a + 8 = -9 a + 11\)

\((-3 a - 2) - (6 a + 5) = -3 a - 2 + -6 a - 5 = -9 a - 7\)

\(4 (2 a + 7 b + 6) = 8 a + 28 b + 24\)

\((-3 p - 7) (6 q + 4) = -18 p q - 12 p - 42 q - 28\)

\((6 x + 4) (5 x + 7) = 30 x^{2} + 42 x + 20 x + 28 = 30 x^{2} + 62 x + 28\)

\((x + 5) (x - 4) = x^{2} - 4 x + 5 x - 20 = x^{2} + x - 20\)

\((a + 6)^{2} = a^{2} + 12 a + 36\)

\((-6 x + 9)^{2} = 36 x^{2} - 108 x + 81\)

\((-9 x - 6 y)^{2} = 81 x^{2} + 108 x y + 36 y^{2}\)

\((x - 4) (x + 6) (x - 5) = (x - 4) (x^{2} + x - 30) = x^{3} + x^{2} - 30 x - 4 x^{2} - 4 x + 120 = x^{3} - 3 x^{2} - 34 x + 120\)

\(x (x + 8) (x - 5) = x (x^{2} + 3 x - 40) = x^{3} + 3 x^{2} - 40 x\)

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

\((8 a + 6) (8 a - 6) = 64 a^{2} - 36\)

\((p + 6) (p - 6) = p^{2} - 36\)