求y=(2+3x)(3-5x+x^2)的导数哥们们，三个人答案没一个相同的，让不让我活了

已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值 y=3(x-y),x=2(x-y)求x,y的值 已知x-y=3,求[（x+y)(x-y)-(x-y)^2+2y(x-y)]除以的值 若x-y/x+y=5,求x-y/2x+2y+5x+5y/3x-3y的值 (x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5) 若x+y分之x-y=3,求式子x+y分之5(x-y)—2(x-y)分之x+y的值 若x-y分之x+y=3,求式子x+y分之5(x-y)—2（x-y）分之x+y的值 2x+3y/5x-3y=3/5求x/y的值 求5x-2y=x-y=4x-3y-2的解 x+y/3x-2y=5/3 求x:y的比值 已知3x-2y/x+y=5/3求x；y的值 已知x+y/3x-2y=5/3求x；y的值 已知5|x+y-3|+(x-2y)²=5,求x+y的值 (x+y-5)+|3y-2x+10|=0,求 x,y的值 1.已知:x-2y=3,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除4x 的值 已知x-2y=2011,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]÷4x的值. 已知x-2y=2016,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除以8x的值