Question

Раскройте скобки.
(a-b)+(c-d)
(x+y)-(z+t)
(m-n)-(k-t)
(t+s)+(-p-m)

Answer 1

(a-b)+(c-d)=a-b+c-d
(x+y)-(z+t)=x+y-z-t
(m-n)-(k-t)=m-n-k+t
(t+s)+(-p-m)=t+s-p-m