5(9a-4b+c)=5*9a-5*4b+5*c=45a-20b+5c
-8(x-8-7y)=-8*x-8*(-8)-8*(-7y)=-8x+64+56y
(m+7n-6r)*(-1,3)=-1,3*m-1,3*7n-1,3*(-6r)=-1,3m-9,1n+7,8r
-a(-b-4,2d+3c)=-a*(-b)-a*(-4,2d)-a*3c=ab+4,2ad-3ac
0,8x(-7-3m+1,2p)=0,8x*(-7)-0,8*3m+0,8*1,2p=-5,6x-2,4m+0,96p
-12(5/6x+1/4y-5/12z-0,1)=-12*5/6x-12*1/4y-12*(-5/12z-12*(-0,1)=
= -10x-3y+5z+1,2