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(2x-3)2=36;
2x-[x-(x-1)]=(x-1);
(-2x-1)2=( )2+________+( )2;
-5·(-5)2=________;若x2n=4,则x6n=________;a12=(________)6=(________)3;若644×83=2x,则x=________.
若(2x-y-3)2+|3x-4y-2|=0,则x=________,y=________;