(3x²/4y)²乘4y/3x再加x²/2y²除以2y²/x

(3x²/4y)²乘4y/3x再加x²/2y²除以2y²/x 化简求值.（x-2y分之4xy 再加+x)除以4x³-x²y分之x²+4xy+4y (2x-y)²-4(x-y)(x+2y) 化简：（2x-y)²-4(x-y)(x+y) 2x^4+4x^2y^2+2y^4除以(x²+y²) (3y分之2x²）²乘4x分之3y+2y²分之x²除以xy分之3 (3x-y)²-2x（4x-5y）-（x+2y）² 已知x²+3xy-4y²=0,求(x-2y)除以(x+2y)的值 (x+y)和(x-y)各看成一个整体,合并同类项2(x+y)-3(x-y)²+3(x+y)+4(x-y)
（x-2y）²+（2x-4y)(x+y)+(x+y)² 化简 3(X-Y)²-4(X-Y)+7(X-Y)-6(X-Y)² 因式分解：(x-y)(3x-7y)²-4(x-y)(x+y)²