请高手指点一下:一个递归式的正则表达式的写法

请高手指点一下  
 
TotalSpot*(TotalSpot*(TotalSpot*(MediaUnitCost*(1-MediaNegotiationDiscount)*(1-OtherMediaDiscount)*(1-Agency  Discount)*(1+MediaNegotiationLoading)*(1+OtherMediaLoading))))   TotalSpot*(TotalSpot*(TotalSp