若x-y=5,-xy=3,求(7x+4y+xy)-6(5/6y+x-xy)的值,

已知X+Y=6,xy=3求代数式（5XY+4X+7Y)+(6X-3XY)-(4XY-3Y)的值 x-y=3,xy=5,求代数式（7xy+4x-7y）+(6x-3xy)-(3y+4xy)的值 已知x+y=3,xy=1,求代数式5xy+4x+7y+6x-3xy-4xy+3y的值. x+y=8,xy=-2,求(5xy+4x+7y)+(6x-3xy)-(4xy-3y)的值 若x-y=5,-xy=3,求（7x+4y+xy）-6(5/6y+x-xy)的值 若x-y=5,-xy=3,求(7x+4y+xy)-6(5/6·y+x-xy)的值 若X-Y=5,-XY=3,求(7X+4Y+XY)-6(六分之五Y+X-XY)的值 若x-y=5,-xy=3,求(7x+4y+xy)-6(六分之五y+x-xy)的值. 若x+y-5xy=0,求(2x-3xy+2y)/(x+2xy+y)的值 若x+y=5,xy=6,求x^2y+xy^2的值 x^+2xy+y^+4=16 x^-2xy+y^=16 求(3xy+6y^)+|x^-(2xy+2y^-3x^)|的值 已知xy^2=-6,求-xy(x^3y^7-3x^2y^5-y）的值