помогите пожалуйста

1.
а) а+3/а-(3-а)/3а=3(а+3)-а(3-а)/3а=3а+9-3а+а/3а=9+а/3а

б) х/х+1+(х)/х+1=х(х+1)+х(х-1)/(х-1)(х+1)=х+х+х-х/х-1=2х/х-1

в) х/х-2у-(4у)/х-2ху=х/х-2у-(4у)/х(х-2у)=х-4у/х(х-2у)=(х-2у)(х+2у)/х(х-2у)=х+2у/х

г) 2а+b-(4ab)/2a+b=2a(2a+b)+b(2a+b)-4ab/2a+b=4a+2ab+2ab+b-4ab/2a+b=4a+0+b/2a+b=4a+b/2a+b

2.
3/х+3+(3)/х-3х+(2х)/9-х=3/х+3-(3)/х(-х+3)+(2х)/(3-х)(3+х)=3х(-х+3)-3(х+3)+2х/х(-х+3)(х+3)=-3х+9х-3х-9+2х/х(-(х-3))(х+3)=-х(х-3)+3(х-3)/х(-(х-3))(х+3)=-(х-3)(х-3)/х(-(х-3)(х+3)=-(х-3)/х(-(х-3))(х+3)=х-3/х(х+3)=х-3/х+3х