(4-y)^2-4(1-y)(3+6y)

(y^2)^4y-(-2y)^3y^6= (4-y)^2-4(1-y)(3+6y) 计算：[(y+1)/(y^2-4y+3)减去(y-2)/(y^2-6y+9)]除以(y-5)/(y-1) 常微分方程的通解dy/dx=(x-y+1)/(x+y-3)y^4=2y^n+y=0y''+6y'+9y=e^(-3x)y''+y'-2y=4e^(2x) y (3y^2+8y-3)-6y(3y+2y-1)+9y 解3y+5/3y-6=1/2+5y-4/2y-4 4y(y-1)=3 3y^2+2√6y=-2 {3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1 计算（3y-1)(2y+3)-(6y-5)(y-4) （3y-1)(2y-3)+(6y-5)(y-4)=?xie (3y－1)(2y一3)十(6y一5)(y一4) （3y-1)(2y-3)+(6y+5)(y-4)=? （y+1)分之（2y+3)=（3y+4）分之（6y+7） 4y²-4y/y²-2y+1÷(y+1/y-1-y-1/y+1)÷(3y+3) 6y-(y+2分之y+2-y分之y)÷(y^3-4y-2y^2+8分之y) 怎么算 [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 (y-4)(3y+2)-(3y-7)(2y+1),其中y=4/3