Раскройте скобки: 1) -12(5/6 a - 1/4 b + 7/24 c - 1/12); 2) (16a + 8b - 5/9 c - 4/9 d) * (-9/32 n); 3) -4/15 bc(-45a

1) -12(5/6 a - 1/4 b + 7/24 c - 1/12)=-10a + 3b - 3 1/2 c + 1;2) (16a + 8b - 5/9 c - 4/9 d) * (-9/32 n)=-4 1/2an - 2 1/4 bn + 5/32 cn + 1/8 dn;3) -4/15bc(-45a - 30d + 3 3/4m - 3/8)=12abc + 8dbc - mbc +1/10bc;4) (-3,6ab + 20a - b - 100) * (-5xy)=18abху - 100aху + 5bху + 500xy.