说明：  数学计算工具，可计算任何数的阶乘，最大公约数，最小公约数，显示任何数是否是素数，显示菲波拉契数列的前N项，对任意十个数进行排序
(Mathematical tools, calculates the factorial of any number, the common denominator, the minimum divisor, display any number whether it is prime, show Feibo Appalachian series before the N items are sorted for any ten numbers)