1) 2x-(x+1)=2х-х-1=х-1; ///
2) n+2(3n-4)=n+6n-8=7n-8; ////
3) p+(1.4-p)=р+1,4-р=1,4; ///
4) -8.3-(x-8.3)=-8,3-х+8,3=-х; ///
5) -(n умножить x)+x=-nx+x; ////
6) p+(-m+k умножить p)=p-m+kp; ///
7) -(m-a) - (b+a)=-m+a-b-a=-m-b; ///
8) m-(2+m)-(-a-m)=m-2-m+a+m=a+m-2;