一个计算器，可以计算类似于sqr({84/4-{[3*4*5-(96/6)*3]*13-5*16}/sqr(2^4)}^2)的表达式。,很不错的FLASH源码，适合FLASH爱好者学习研究。-A calculator, can be calculated similar to sqr ({84/4- {[3* 4* 5- (96/6)* 3]* 13-5* 16}/sqr (2 ^ 4)} ^ 2)expression. Very good flash source code, suitable