-4(3x-6)-3(2+7x)=
2x-(x+4)=
7-(-x+6)=
-(-y+2)+(-2y-4)=
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-4(3x-6)-3(2+7x)=
-12x+24-6-21x=
-33x+18
2x-(x+4)=
2x-x-4=
x-4
7-(-x+6)=
7+x-6=
x+1
-(-y+2)+(-2y-4)=
y-2-2y-4=
-y-6