-4x^3+16x^2y^2-16xy^3

x^+2xy+y^+4=16 x^-2xy+y^=16 求(3xy+6y^)+|x^-(2xy+2y^-3x^)|的值 已知2x-3根号xy-2y=0(x>0),求x^2+4xy-16y^2/x^2+xy-9y^2 已知2X-3√xy-2y=0(x>0)求2x²+xy-9y²分之x²+4xy-16y
（-3x^y+2xy)-( )=4x^+xy x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2 已知x-y=4xy，则2x+3xy-2yx-2xy-y 因式分解-x^3+2x^2y-xy^2和16(x-y)^2-9(x+y)^2和(x+2)（x+4）+x^2-4 (x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y) 计算3x/8y×16y²/27x² （2xy-x²）÷x-2y/xy 2x-6/x (2x²y-3xy²)-3(x²y-2xy²)+2（x²y-4xy&# xy=-2,x+y=3,求代数式（4xy+12y)+[7x-(3xy+4y-x)] 已知x-y=4xy,求x-2xy-y分之2x+3xy-2y的值!