zad 1
3 * 2 - 2 = 4
12*(2+4) - 4*2 = 12 * 6 - 8 = 72 - 8 = 64
zad 2
x= 4 : 4 - 6 * 4 + 8 = 4 - 24 + 8 = -20 + 8 = -12
x=2: 2 - 6 * 2 + 8 = 2 - 12 + 8 = -10 + 8
x=-1: -1 - 6 * -1 + 8 = -1 - (-6) + 8 = 5 + 8 = 13
zad 3
(3-1)*(3-2)*(3-3)*(3-4)*(3-5)*(3-6) = 2 * 1 * 0 * -1 * -2 * -3 = 0