Помогите с алгеброй пожалуйста!

2...=(m-n)-(n-m)-(m-n)=m-n-n+m-m+n=m-n
4...1)(-4х/4-5/8)= -х +20/8=-х+5/2=-2х+5=5-2х
2)(16х²-8х)/-4х=-8х(2х-1)/4х=-2(2х-1)=-4х+2=2-4х
3)5-2х+2-4х-х02=-7х+5=5-7х
5.1)10(0,5х³-1)=5х³-10
2)(-3,6х⁶+х³)/-12х³=х³(3,6х³+1)/12х³=(3,6х³+1)/12
3)(3,6х³+1)/12-(8х²-97/12)=(3,6х³+1)/12 - 8х²+97/12=
=(3,6х³+1-96х²+97)/12=(3,6х³-96х²+98)/12=
=2(1,8х³-48х²+49)/12=(1,8х³-48х²+49)/6
4)(5х³-10)+(1,8х³-48х²+49)/6=
=6(5х³-10)+(1,8х³-48х²+49)/6=
=(30х³-60+1,8х³-48х²+49)/6=
=(31,8х³-48х²-11)/6