-½x²×(2xy²-4x²y²)-4x²y×(-xy),其
-½x²×(2xy²-4x²y²)-4x²y×(-xy),其
计算:(xy-x²)×x-y/xy
x²/xy-x/y
3x²y+xy²-[2xy²-4x²y+(x²y-2xy²)
(2x²y-3xy²)-3(x²y-2xy²)+2(x²y-4xy
(-x-2y)(x²-2xy+4y²)
化简(x²y-4y²)/(x²+4xy+4y²)*[(4xy)/(x-2y)+x
x-y/x²÷x²-2xy+y²/xy*(xy-x²)
-3(xy-2x²)-[y²-(5xy-4x²)+2xy]
化简4xy-3y²-3x²+xy-3xy-2x²+x²-2y²
计算 2xy[4x²y²-3y(xy+x²y)-xy²]
1.化简:x²-4y²/x²+y²+2xy÷2y+x/x²+xy.