Question 524752
={{{(4y/(y^2-1)+3y/(1-y)-4/(y-1))}}}
={{{(4y/(y^2-1)-3y/(y-1)-4/(y-1))}}}
={{{(4y/(y-1)(y+1)-3y/(y-1)-4/(y-1))}}}

Take LCM

={{{((4y-3y(y+1)-4(y+1))/(y-1)(y+1))}}}


={{{((4y-3y^2-3y-4y-4)/(y-1)(y+1))}}}


={{{((cross(4y))-3y^2-3y-(cross(4y))-4)/(y-1)(y+1))}}}


={{{(-3y^2-3y-4)/(y-1)(y+1))}}}


={{{(-3y(y+1)-4)/(y-1)(y+1))}}}


={{{(-3y(y+1)/(y-1)(y+1)-4/(y-1)(y+1))}}}


={{{(-3y(cross(y+1))/(cross(y+1))(y-1)-4/(y-1)(y+1))}}}


={{{(-3y/(y-1)-4/(y-1)(y+1))}}}