Question

Раскрой скобки:
1 (a-b)-(c-d)
2 -t-(-a+b)+k
3 -t-(a-c+t+k)
4 -b+(-a-c+f)-(-k-n+t)

Answer 1

1) a-b-c+d
2) -t+a-b+k
3) -t-a+c-t-k
4) -b-a-c+f+k+n-t