1、(3\4+4\3y^2)^2 2、(4x-3y)(3y-4x) 3、(2x-1\2y)(1\2y-x)

(y-4)(3y+2)-(3y-7)(2y+1),其中y=4/3 2(y-4)(3y+2)-5(-3y+7)(y+1),其中y=-1 4y²-4y/y²-2y+1÷(y+1/y-1-y-1/y+1)÷(3y+3) (3y+2)(y-4)-3(y-2)(y-3) 解分式方程（y+3)/(y^2+y)-1/(1-y)=4/y要过程 (y^2)^4y-(-2y)^3y^6= (4-y)^2-4(1-y)(3+6y) 数学题=y(y+3)-4(y+3)2=(y+3)(y-4y-12) 4y的平方-3y-1=y-2 y-1/y-2 - y-3/y-4=y-2/y-3 - y-4/y-5一共有四个分数哦~希望可以快一点~谢谢! 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 计算(2y+1)^2×(2y+1)^3+(2y+1)^4【-(2y+1)】 3y-2＜1+4y 2-3(y+2)≥2(y-1) 解3y+5/3y-6=1/2+5y-4/2y-4 4y(y-1)=3 3y^2+2√6y=-2 计算：(-3y)^2(2y+1)-(3y-5)(3y+4)