(15x^4y4-9x^5y^3-3x^6y^2)/(-3x^2y)^2

(15x^4y4-9x^5y^3-3x^6y^2)/(-3x^2y)^2 解方程组：x+y2＝3x−2y＝10+6x+y4 x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8 解方程组：2(x−y)3−x+y4＝−1123(x+y)−2(2x−y)＝3 数学(x-y)^5*(y-x)^3*(x-y)^2 2(2x+3y)(3x+2y)-(6x-y)(2x-5y) （x+2)(x+3) (x-4)(x+1) (y+4)(y-2) (y-5)(y-3) x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20 {(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20 4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6 {3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1 6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5