zadanie 1
a) - (x+2y-3)
b)8- ( y - 3x + 4 )
c)6y-(9x-2y-1)
d)1+(-2-2y-2)
e) x+y + (-x+2y-1)
f)-x-3y-(-x-3y)
a)
b)
c)
d)
e)
f)
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a)
b)
c)
d)
e)
f)