1385.
10а+(4-4а)=10а+4-4а=6а-4
-(4b-10)+(4-5b)= - 4b+10+4-5b=14-9b
(c-5d)-(-d+5c)=c-5d+d-5c= - 4d-4c= - 4(d+c)
-(5n+m)+(- 4n+8m)-(2m-5n)= -5n-m-4n-8m-2m+5n= - 4n-11m
1587.
(14-15.8)-(5.8+4)= 14-15.8-5.8-4=10 - 21.6= - 11.6
-(18+22.2)+(-12+22.2)-(5-12)= - 18-22.2-12+22.2-5+12= - 18-5= - 23