[(x-y)²+(x-y)(x+y)]÷2x初二数学计算.

初二下册计算：（x-y ／x+2y）³ 数学计算(x²-y²)(x+y)÷(x+y)² 数学用乘法公式计算(x+y+1)(x+y-1)(2x-y-3)² [(x+y)(x-y)-(x-y)²]÷(-2y)数学高手来 数学计算填空(5x+y)(5x-y)(5x+y)(-5x+y)(5x+y)(-5x-y)(5x+y)(x-5y)(x ^ 计算：(x+y/x-y)÷(xy+x^2) 计算(x²/x+2y)-x+2y-2 计算 [12(x+y)³(y-x)]³÷[4(x+y)²（x-y)]² 计算：(x-y)^7÷(y-x)^6+(-x-y)^3÷(x+y)^2 [(2x+y)(x-3y)+y(x+3y)]÷(2x)计算, 计算:(-x-2y) * (3x-y) 计算:(x-y)^2*(y-x)^2*(x-y)^6