化简0.5x乘以x乘以y乘以x-y乘以x乘以x^2+0.5x乘以x乘以y

化简0.5x乘以x乘以y乘以x-y乘以x乘以x^2+0.5x乘以x乘以y 化简 x乘以根号下（y/x x乘以y等于几 (x+y)的平方乘以(x-y)-(x-y)乘以(x的平方+y的平方) (x+y)的平方乘以(x-y)-(x-y)乘以(x的平方+y的平方) (x-y)平方乘以(x-y)的3次方乘以(y-x)平方乘以(y-x)的3次方 x的平方乘以y减y 化简x乘以根号x分之y,y小于0 x乘以Y=x乘以（1-10%）乘以Y+x乘以（1-10%）乘以2 等于多少啊 (x-y)的三次方乘以(x-y)的二次方乘以(y-x) 等于多少 (x-y)的三次方乘以(x-y)的平方乘以(y-x) (x-y)乘以（y-x)的二次方乘以（x-y)五次方 5x乘以5y等于几 x平方乘以y平方等于多少 -y乘以-x 得正数还是负数? XY（XY-X2)乘以------------X-Y y=e^x乘以sinx 求导. (X-3Y)乘以(-3XY)=