zad.1
f) -(2x - 3y +4z - 5)
zad.2
a)-(y+ - x + 2z)
b)-(-(5w + 1))
c)-(-(n - 1))
d)-(-(x + y + z - a))
e)(-(y - x) + (a + 2b))
f)-(-(-5x + 1) + (8 - (x - 1)))
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1) f) =-2x+3y-4z+5
2) a)-y+x-2z
b)-(-5w-1)=5w+1
c) -(-n+1)=n-1
d)-(-x-y-z+a)=x+y+z-a
e)-y+x+a+2b
f) -(5x-1+8-x+1)=-5x+1-8+x-1