计算 (-4/3xy)(-3x^2y)^2=( )

计算：5xy^2-[3xy^2-(4xy^2-2x^2y)]+2x^2y-xy^2 计算：3xy[2xy-x（y-2）+x] 计算3xy[2xy-x(y-2)+x-1] 计算-（x²y+3xy-4）+3（x²y-xy+2） 计算xy^2(-xy)^2-3/2xy^3*4/3x^2y 计算5x^3y*(-3y)^2+(-6xy)^2*(-xy)-xy^3(-4x)^2 计算：（-3xy)^3*(-4/3x^2y) 计算 (-4/3xy)(-3x^2y)^2=( ) 计算:-2xy^2÷(-4y/3x)^2 计算4x^2y^3/(-二分之一xy)^2 计算(3x-4y)-(3x+4y)-xy 计算:(3x^2-2y^2)-(-x^2+2xy+y^2)-(x^2-4xy+3y^2) 计算(3xy²)·(-2xy),(2x-y)²-4(x+y)(x-2y), 计算：3xy(x²y-xy²+xy)-xy²(2x-xy+2x） (-2x²y)³·3xy÷2xy²·4x计算 计算：4xy²-3x²y-{3x²y-[2xy²-4x²y+2(x²y-2xy²)]急 计算：（1）8x^2y^2*(-3x/4y^5) (2)(x+y)^2/xy-y^2*(y-x)^2/xy+y^2 计算(-x的平方+3xy-4y的平方)-3(2xy-3y的平方)怎么计算?