x(y-x)-y(x-y) (-3xy)*5c^2Y+6x^2(7/2xy^2-2y^2)

-x-3xy+y |x|/x+y/|y|+xy/|xy|= 因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y) xy(x-y)-x(x-y)² 因式分解：3xy(x-y)+6y(y-x) [x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y [x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y [x(x^2y^2-xy)-y(x^2-x^3y)]/(2x^2y) 【x(xy-xy)-y(x-xy)】÷3xy X^Y-2XY^2+y^3 xy-1+x-y 集合{(x,y)|xy 1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y) 化简：x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y) 3y/x*x-y*y+x/x*x-2xy+y*y+6y*y/x*x*x-x*x*y-xy*y+y*y*y等于多少? (x+3y)/(x^2+xy)-x+y计算题 -xy^2(x+y)^3+x(x+y)^2因式分解 因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6