Преобразовать в многочлен следующие выражения

1) (c-7) (4+2c) - 6c (1-3c) - (9c-2) + (3-c)

2) 5 (a+3) (5-a) - (a-8) (1-a) - 2a (3a-6)

3) 4 (2a+1) (5a-3) - 3 (a+2) (a+3)

4) - 2 (6-3m) (m+1) + 5 (m-4) (m-5)

1) (c-7) (4+2c) - 6c (1-3c) - (9c-2) + (3-c)

4c+2c²-28-14c-6c+18c²-9c+2+3-c

-26c+20c²-23

20c²-26c-23

2) 5 (a+3) (5-a) - (a-8) (1-a) - 2a (3a-6)

5 (5a-a²+15-3a) - (a-a²-8+8a) - 6a²+12a

25a-5a²+75-15a-a+a²+8-8a-6a²+12a

13a-10a²+83

-10a²+13a+83

3) 4 (2a+1) (5a-3) - 3 (a+2) (a+3)

4 (10a²-6a+5a-3) - 3 (a²+3a+2a+6)

40a²-24a+20a-12-3a²-9a-6a-18

37a²-19a-30

4) - 2 (6-3m) (m+1) + 5 (m-4) (m-5)

-2 (6m+6-3m²-3m) + 5 (m²-5m-4m+20)

-12m-12+6m²+6m+5m²-25m-20m+100

-51m+88+11m²

11m²-51m+88