(-2/3x^2y^3)^3·(3xy)^2-(-1/2x^4y^3)^2·4/3y^4还有一题2/3（x-y)^3·9/4(x-y)^5·7/15(y-x)^8
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(-2/3x^2y^3)^3·(3xy)^2-(-1/2x^4y^3)^2·4/3y^4还有一题2/3（x-y)^3·9/4(x-y)^5·7/15(y-x)^8(-2/3x^2y^3)^3·(3xy
(-2/3x^2y^3)^3·(3xy)^2-(-1/2x^4y^3)^2·4/3y^4还有一题2/3（x-y)^3·9/4(x-y)^5·7/15(y-x)^8
(-2/3x^2y^3)^3·(3xy)^2-(-1/2x^4y^3)^2·4/3y^4
还有一题2/3（x-y)^3·9/4(x-y)^5·7/15(y-x)^8
(-2/3x^2y^3)^3·(3xy)^2-(-1/2x^4y^3)^2·4/3y^4还有一题2/3（x-y)^3·9/4(x-y)^5·7/15(y-x)^8
(-2/3x^2y^3)^3·(3xy)^2-(-1/2x^4y^3)^2·4/3y^4
=-8/27x^6y^9·9x^2y^2-1/4x^8y^6·4/3y^4
=-8/3x^8y^11-1/3x^8y^10
2/3（x-y)^3·9/4(x-y)^5·7/15(y-x)^8
=2/3*9/4*7/15（x-y)^3*x-y)^5*(x-y)^8
=7/10（x-y)^16
2x²y-3(2xy-xy)-xy
x^2-xy-6y^2+3xy+y+2
因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y)
X^Y-2XY^2+y^3
化简：3x^2-[5xy-(x^y-3xy)+4x^2y-8xy]
（X-3xy+4xy-y）-[-2x-2（xy-3/2xy）-y]+6xy的过程
xy-2{xy-[3x^2y-(4xy^2+0.5xy)]+4x^2y}+6xy^2
计算：3xy[2xy-x（y-2）+x]
计算3xy[2xy-x(y-2)+x-1]
（-3x^y+2xy)-( )=4x^+xy
x*x+xy=3,xy+y*y=2,则x*x+2xy+y*y=________?
(x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)答案应为-2x-x*x-3x，
因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6
x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2
5x^3y*(-3y)^2+(-6xy)^2*(-xy)+xy^3*(-4x^2)
3xy(x^2y-xy^2+xy)-xy^2(2x^2-6xy+2x)过程
计算：3xy(x²y-xy²+xy)-xy²(2x-xy+2x）
(-1/3xy)^2•[xy(2x-y)-2x(xy-y^2)]