Помогите решить. -(-a+b)+(d-c) = -m-(a-b)-n = k-(-t+p-c-b) = a-(c-l-f)+(+k-f+n) = (a-b)-(c-d) = - l - (a-+b)+k = - t -(a-c + t + k) = -b+(-a-c+f)-(-k-n+l) =
=a-b+d-c =-m-a+b-n =k+t-p+c+b =