упростить:-6x×4y×(-27)
-2,5a×0,04c
5xz×3yz
3a +5 -(2a+6) +4a
-3×(2m+n) +(7m-n)
4x-(5x-(1-x))​

-6x*4y*(-27)=648ху

-2,5a*0,04c=-0,1ас

5xz*3yz=15zyz^2

3a +5 -(2a+6) +4a=3a+5-2a-6=a-1

-3*(2m+n) +(7m-n)=-6m-3n+7m-n=m-4n

4x-(5x-(1-x))=4x-(5x-1+x)=4x-(6x-1) =4x-6x+1=1-2x