(6y^4-8y^3)/(-2y^2)+3( )=4y-3问空格内应填什么

y (3y^2+8y-3)-6y(3y+2y-1)+9y 6y-(y+2分之y+2-y分之y)÷(y^3-4y-2y^2+8分之y) 怎么算 (y^2)^4y-(-2y)^3y^6= 4x-3y/x-2y÷6y-8x/y-2x 4y（3y-2）-2y（6y+5）＞8解不等式 解方程：(y+4)/5+y+6=(y+8)/2-(y+4)/3要过程 81/8*(-x-y)^6*(x-y)^3*4/9(x+y)^4*(y-x)^2 [T,Y]=ode45(@rigid,[0 1],[rand(15,1)]);plot(T,Y(:,1),'-',T,Y(:,2),'-.',T,Y(:,3),'.',T,Y(:,4),'-',T,Y(:,5),'-.',T,Y(:,6),'.',T,Y(:,7),'-',T,Y(:,8),'-.',T,Y(:,9),'.',T,Y(:,10),'-',T,Y(:,11),'-.',T,Y(:,12),'-.',T,Y(:,13),'.',T,Y(:,14),'-',T,Y(:,15),'.') 2y+5/3y-6-y/2=5y-4/2y-4 先化简,在求值：6y-(y+2分之y + 2-y分之y)除以y³-4y-2y²+8分之y,其中y= -2分之5先化简,在求值：6y-(y+2分之y + 2-y分之y)除以y³-4y-2y²+8分之y,其中y= -2分之5 1.（（y+2x)(-2x+y)+4(x+2y)^2)/3y 2.（2(x-y)^3-8(x-y）^2(x+y)+6y(x-y)^2）/2（x-y)^2 (3y+2)(y-4)-3(y-2)(y-3) 【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y) (4-y)^2-4(1-y)(3+6y) [2(x-y)^5-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2[2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2 通分 y+3/y*y-6y+9,1/2y+6,y-1/y*y-9 【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2= 数学题=y(y+3)-4(y+3)2=(y+3)(y-4y-12)