(6y*3 - 4y*2)÷( )=2y*2

(y^2)^4y-(-2y)^3y^6= 6y-(y+2分之y+2-y分之y)÷(y^3-4y-2y^2+8分之y) 怎么算 2y+5/3y-6-y/2=5y-4/2y-4 y^2-6y-2÷2y-4= 数学题=y(y+3)-4(y+3)2=(y+3)(y-4y-12) 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 4x-3y/x-2y÷6y-8x/y-2x 4y(y-1)=3 3y^2+2√6y=-2 解3y+5/3y-6=1/2+5y-4/2y-4 （x+y）/2- x-y/2=6 3(x+y)=4(x-y) x+y/3+x-y/2=6 4(x+y)-2(x-y)=40 {3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1 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 4x-2y-6y*-y-3x+5y* *=2 就是平方 解方程：(y+4)/5+y+6=(y+8)/2-(y+4)/3要过程