Выполните действия; 1) - 10m (2m+4p); 2) (-b+y) * (-13-y); 3) (x+y) * (x-13); 4) (m+18) * (y+3); 5) (m+12) * (y-3)

1) - 10m (2m+4p)

-10m*2m+4p * (-10m)

-20*m*m-40pm

2) (-b+y) * (-13-y)

-b * (-13) + y * (-13) - b * (-y) + y * (-y)

13b-13y-b * (-y) + y * (-y)

13b-13y+by-y*y

3) (x+y) * (x-13)

x*x+y*x+x * (-13) + y * (-13)

x*x+y*x-13x-13y

4) (m+18) * (y+3)

m*y+18*y+m*3+18*3

m*y+18y+3m+54

5) (m+12) * (y-3)

m*y+12*y+m * (-3) + 12 * (-3)

m*y+12y-3m-36