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3x-2y+1-(x+y) = 2x-3y+1
2.
4m+2n-(3+m)-(n+1)= 5m+n-4
3.
-2t+u-(w+t-1)+w= -3t+u+1
4m+2n-3+m-(n+1)=5m+n-4
-2t+u+(w+t)-1+w=-3t+u+1
3x-2y+1-(x+y) = 2x-3y+1
2.
4m+2n-3+m-(n+1)= 5m+n-4
3.
-2t+u-(w+t-1)+w= -3t+u+1