可以进行混合运算，混合运算包括加法+，减法-，乘法*，除法/，取余%，左括号(，右括号)，根号√，对数log，指数^。 如 ...

When developing customer management systems or subscription-based services, the requirement to accurately calculate how much time has elapsed between two dates arises frequently. Examples include ...

In system development using Java, processes such as aggregating large amounts of numerical data to find a total or multiplying values according to specific rules occur frequently. In conventional ...