-2x-(2y+x) - ( 4x -y) = Liczby algebraiczne
-2x-[2y+x]-[4x-y]= -2x-2y-x-4x+y= -7x-y
prosze bardzo
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-2x-[2y+x]-[4x-y]= -2x-2y-x-4x+y= -7x-y
prosze bardzo