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函数表达式计算工具 可以计算各种不同的函数、以及四则运算，可以处理括号，还可以计算正余弦，是一款不可多得的表达式计算类和计算工具。-Function expression calculation tool can calculate a variety of functions, as well as four computing, you can deal with brackets, but also can calculate the cosine is, is a rare type of the expression of calculation and calculation tools.
