`x^2+25xy+150y^21.x^2+25xy+150y^22.(x+1)(x+2)-x-103.x^2-3xy-18y^2-3x-9y全是因式分解~

`x^2+25xy+150y^21.x^2+25xy+150y^22.(x+1)(x+2)-x-103.x^2-3xy-18y^2-3x-9y全是因式分解~ （x^2+xy/x-y)/（xy/x-y)计算 (-x-y)(x^2+xy+y^2) 化简x^-y^/x^-2xy+y^ 2*(x-y)²(y-x)(xy) x^2-xy/xy-y^2约分 .(x+y-2)(x+y-2xy)+(xy-1)^2 (x^2-xy)y÷y-x/xy怎么做? 代数 x^-y^/ x^-(y-z)^ 除以 x^+2xy+y^/(x-y)^-z^ 乘 x^+xy-xz/x^-xy (x+y)/x /(x-(2xy-y^2)/x) 因式分解 (xy-x²)÷(x²-2xy+y²/xy)×（x-y/x²） x-y/x²÷x²-2xy+y²/xy*（xy-x²） X-Y/2X+2Y XY/X+Y² 因式分解：x×x-xy-2y×y-x-y （y/(x^2-xy)+x/(y^2-xy))除以(x-y)/(xy) x的平方+25xy+150y的平方还有这道题（x+y)(x+2)-x-10 因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y) (x-y)[(x+y)^2-xy]+(x-y)[(x-y)^2+xy]