Раскрыть скобки:
(х+у-z)-(x+у-z)
(а+b-c)+2
a+(b-c)
a-(a-b+c)
(x-y)-(x-y)
(a-b+1)-(a+b-1)
(х+у-z)-(x+у-z)
(а+b-c)+2
a+(b-c)
a-(a-b+c)
(x-y)-(x-y)
(a-b+1)-(a+b-1)
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Ответ:
x+y-z-x-y+z
a+b-c+2
a-a+b-c
x-y-x+y
a-b+1-a-b+1
Объяснение: