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a)3(-2)+4
-6+4
-2
b)
-8(-2*3)
-8-6
-7
c)
2*4+(3 * -3) -6
8+(-9)-6
-7
zad.2
n-1
n-3
n-5
zad.3
a)
-4x+4y
b)
6x-12y-6x+4y
-8y