Упростите выражение:
1)0.3(1.2х-0.5у)-1.5(0.4х+у)
2)-2.4(2.5а-1.5в)+0.5(1.8в+5.6а)
3)-1.8(3.5m-5)-6.5(0.8-0.4m)
4)4/9(1 1/2c-3/8)-(1 5/6-1 1/3c)
5)1.2(5/6 k+0.4n)-1/8(5/9k-0.3n)
6)(1/6a+6.5)-(2 7/9a +3 1/3)