(1)原式=2x-2y-x+6y+3 =(2-1)x+(-2+6)y+3=x+4y+3,当x=2011,y=- 1 4 时,原式=2011+4×(- 1 4 )+3=2013.(2)原式=(4-3)xy+(-3+2)x2-2y =xy-x2-2y,当x=-1,y=1时,原式=(-1)×1-(-1)2-2×1=-1-1-2=-4.