1,因为1/X-1/Y=3
所以X-Y=-3XY
所以(2X-14XY-2Y)/(X-2XY-Y)
=[2(X-Y)-14XY]/(X-Y-2XY)
=(-20XY)/(-5XY)
=4
2,因为M-1/M=-1
所以M^2+M-1=0
所以M^2+M=1
2M^2+2M+1=2(M^2+M)+1=3