е) 2х+12 - 3х - 18 + 18х = 17х +12 -18 = 17х -6
ж) -3х × (2х -3) - (2х - 3) +2 = 6 х^2 + 9х -2х +3 +2 = -6х^2+7х +5
з)(4х-3)× 2 + (-3х + 2) -8 = 5х- 12
