1.(-2x^2y^3)^2·(xy)^3 2.3x^3-(x^2+2x)(3x-1)-3(x+5)(x-2)
1.(-2x^2y^3)^2·(xy)^3 2.3x^3-(x^2+2x)(3x-1)-3(x+5)(x-2)
化简 (x+y)(x²-xy+y²) ; 3(2x-1)(x+6)-5(x-3)(x+6)
[x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y
1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y)
x(x-1)-(x平方-y)=-3,求x平方+y平方-2xy
计算3x[xy-2x(1/y-x/3]+3y(x²-y²)
计算3xy[2xy-x(y-2)+x-1]
计算:3xy[2xy-x(y-2)+x]
计算:(5-xy/x^3-x^2y)/(1-5/xy)^2*(y-x)^3
几道数学题:x-x^2分之x^2-1×1-y分之xy-x,(xy-x^2)÷xy分之x-y,x^2+x分之x-3÷(x^
化简:x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y)
x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4