4(a+2) 8(-7x) 12(x+y) (c-9)*11 (8+y)*16 15(4a-3) 7(6a+8b) 10(2m-3n+4r) (24x+17y-36z)*4

4(a+2)=4а+8
8(-7x)=-56х
 12(x+y)=12х+12у
 (c-9)*11=11с-99
 (8+y)*16=128+16у
 15(4a-3)=60а-45
 7(6a+8b)=42а+56b
10(2m-3n+4r)=20m-30n+40r
(24x+17y-36z)*4=96x+68y-144z