Now this is a part of Arageli library. You can also try my old BP 7.0 unlimited-precision arithmetic package.
-2/3+1/6+6/5; 25 div 4; 25 mod 4; 100!; 100^100; ((((1+2)*3-4)/5-6)*7+8)/9-10; 32!/10!^3/2!;
(Don't forget semicolon at the end of each expression)
You can try also 10000!; and compare the time required with one required for the computation of 10000 factorial in Maple (c) or in Matlab (c) or in your other preferable mathematical package.
You can download binaries:
The program is written on the base of my unlimited-precision arithmetic library (C++).