Раскройте скобки:
1) (4x+5) * 3=
2) (7x+3y+7) * (-4)=
3) 8 * (16a + 9b - 7) =
4) 1/2(одна вторая) (18x + 20y + 16)=
5) (a-b) - (b+a)=
6) (x-y-z) + (y-x+z)=
7) x-(x + y +z)=
8) xy-(xy + y + x)=
9) (14 - 5) - (6+10)=
10) (8x - 9y) - (8x - 9y) + 4=
ПОЖАЛУЙСТА ПОМОГИТЕ! ДАЮ 30 БАЛЛОВ!!
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