a)
[tex]-2m+(-1-3m)=-2m-1-3m=-5m-1\\m-(1+6m)=m-1-6m=-5m-1\\-3-4m-(m-2)=-3-4m-m+2=-5m-1\\3-3m+(2m-2)=3-3m+2m-2=-m+1\leftarrow\textbf{odpada}[/tex]
b)
[tex]2x-y+(3y-x)=2x-y+3y-x=x+2y\\5y-(3y+x)=5y-3y-x=2y-x\leftarrow\textbf{odpada}\\y+2-(2-x-y)=y+2-2+x+y=x+2y\\5x-3y+(5y-4x)=5x-3y+5y-4x=x+2y[/tex]
c)
[tex]-3+5p-(p^2-3)=-3+5p-p^2+3=5p-p^2\\p^2-(2p^2+5p)=p^2-2p^2-5p=-p^2-5p\leftarrow\textbf{odpada}\\2p^2+4p+(p-3p^2)=2p^2+4p+p-3p^2=5p-p^2\\p^2+3p+(2p-2p^2)=p^2+3p+2p-2p^2=5p-p^2[/tex]
d)
[tex]a+b-c-(a+b)=a+b-c-a-b=-c\leftarrow\textbf{odpada}\\2a+(b-a-c)=2a+b-a-c=a+b-c\\2b+3c+(a-b-4c)=2b+3c+a-b-4c=a+b-c\\c-a-(2c-2a-b)=c-a-2c+2a+b=a+b-c[/tex]
