(x+y)^6/(x+y)^4-(x-y)^5/(x-y)^3 化简 ..
化简 3(X-Y)²-4(X-Y)+7(X-Y)-6(X-Y)²
(3x-4y)(5x-4y)-(7x-8y)(6y-5x)
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
化简(x+y)-(2x+y/2)-(3x+y/6)-(4x+y/12)-(5x+y/20)-……-(10x+y/90)
x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8
化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1
5/12[-4/3(x-y)^3] *(x+y)^2 * (-x-y)^3 * 5/6(y-x)^2
{(x,y) |x|+|y|
x>y?x:y
化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方
化简1) (-2x^ y^)(3x^ y^)(-4x^ y^)2) (6√x)\(3√x√x^5)3)已知函数f(x)的
计算:(3x-4y)-[-(2y+x)+(x-3y)]-6x