Раскрыть скобки: 1. (a-b+-b)= 3-(x-y+3)= a-(a-b+c)= (x-+y)= (x--x)= 2. (m-p+q)-p= (a-b++b-1)= m-(m-p+q)= (m-p++p-3)= m-(p-m)=

1. a-b+c-a+b = c
3-x+y-3 = -x+y = y-x
a-a+b-c = b-c
x-y-x-y = -2y
x-y+y+x = 2x
2. m-p+q-p = m-2p+q
a-b+1-a-b+1 = -2b+2
m-m+p-q = p-q
m-p+5-m-p+3 = -2p+8
m-p+m = 2m - p