Преобразуйте в многочлен выражение 1) (-x-2)(2x-3) 2) (3a-5b)(5a+b) 3) (y+3)(y-2y+5) 4)

1. (- x - 2) * (2 * x ^ 2 - 3) = - x * 2 * x ^ 2 - 3 * (- x) - 2 * 2 * x ^ 2 - 2 * (- 3) =
= - 2 * x ^ 3 + 3 * x - 4 * x ^ 2 + 6 = - 2 * x ^ 3 - 4 * x ^ 2 + 3 * x + 6.

2. (3 * a - 5 * b) * (5 * a + b) = 3 * a * 5 * a + 3 * a * b - 5 * b * 5 * a - 5 * b = 15 * a ^ 4 + 3 * a * b - 25 * a * b - 5 * b = 15 * a ^ 4 - 22 * a * b - 5 * b.

3. (y + 3) * 8 * (y - 2 * y +5) = (y + 3) * (8 * y - 8 * 2 * y + 40) = (y + 3) * (8 * y - 16 * y + 40) =
= 8 * y * y - 16 * y * y + 40 * y + 3 * 8 * y - 16 * y * 3 + 40 * 3 = 8 * y ^ 3 - 16 * y + 40 * y + 24 * y - 48 * y + 120 = 8 * y ^ 3 + 8 * y - 8 * y + 120.

4. (m + 3 * n) * (m - 6 * m * n - n) = m ^ 3 - 6 * m * n * m - m * n ^ 2 + 3 * n * m - 3 * 6 * m * n - 3 * n * n = m ^ 3 - 6 * m * n - m * n ^ 2 + 3 * n * m - 18 * m * n - 3 * n ^ 3 = m ^ 3 - 3 * m * n - m * n - 18 * m * n.
5. 2 * x * (3 * x - 1) * (2 * x + 5) = 2 * x * (3 * x * 2 * x + 3 * x * 5 - 2 * x - 5) = 2 * x * (6 * x ^ 2 + 15 * x - 2 * x - 5) = 2 * x * (6 * x ^ 2 + 13 * x - 5) = 2 * x * 6 * x ^ 2 + 2 * x * 13 * x - 2 * x * (- 5) = 12 * x ^ 3 + 26 * x ^ 2 + 10 * x.
6. - 3 * x * (2 - 3 * x) * (3 * x + 11 * x) = (- 3 * 2 * x + 3 * x * 3 * x) * (3 * x + 11 * x) = (- 6 * x + 9 * x ^ 3) * (3 * x + 11 * x) = - 6 * x * 3 * x - 6 * x * 11 * x + 9 * x ^ 3 * 3 * x + 9 * x ^ 3 * 11 * x = - 18 * x ^ 4 - 66 * x ^ 3 + 27 * x ^ 5 + 99 * x ^ 4 = 27 * x ^ 5 + 81 * x ^ 4 - 66 * x ^ 3.