计算:2x∧2 y*(-4y)∧2+(-2xy)∧2 *y-3xy*4xy∧2
(-1/3xy)∧2*[3xy(2x-y)-3x(2xy-4y∧2)]
(x^2+xy/x-y)/(xy/x-y)计算
计算 2xy[4x²y²-3y(xy+x²y)-xy²]
计算:4xy-(x+y)^2/xy(x+y)(x-y)÷x^2+xy-2y^2/x^2y+2xy^2
计算3xy[2xy-x(y-2)+x-1]
计算:3xy[2xy-x(y-2)+x]
计算(xy-y^2)÷x-y/xy
x-y/xy-y^2计算
x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2
已知x-y=4xy,则2x+3xy-2yx-2xy-y
(-3x^y+2xy)-( )=4x^+xy
计算:x²+2xy+y²/xy-y².x²-2xy+y²/xy+y