Built on a 6 . 5 hectare " island " of newly - reclaimed land , the hk $ 4 . 8 billion ( us $ 620 million ) extension project more than doubled the prime function space and increased the hkcec & iexcl ; & brvbar ; s total area to 248 , 000 sq m ( 2 . 67 million sq ft ) , making the entire complex the largest convention and exhibition centre in asia outside japan 项工程共耗资48亿港元（ 6亿2 , 000万美元） ，为原本中心增加逾一倍的面积，达24万8 , 000平方米（ 267万平方尺） ，成为亚洲区内仅次于日本的最大型会议及展览埸地。
By introduction of derivative rule , derivative formula can be found ; through defining multi - dimension function space and reorganizing the function rules , the inaccuracy rules , and the end rules , the scope of formula finding is broadened ; by introduction of three - dimension expand rule and multidimensional expand rule , multi - dimension formulas can be discovered ; through improvement of flow of algorithm , more complete traverse has been achieved 通过引入导数规则，可以发现导数公式；通过定义函数空间，重新组织函数规则，误差规则，终止规则等知识，扩大了公式发现的广度；引入多维扩展规则，可以发现多维函数公式；针对公式发现流程进行了改进，使得对搜索树的遍历更加完备。
