This programming language may be used to instruct a computer to perform a task.
If you know Yacas, please write code for some of the tasks not implemented in Yacas.
YACAS (Yet Another Computer Algebra System) is an easy to use, general purpose Computer Algebra System, a program for symbolic manipulation of mathematical expressions. It uses its own programming language designed for symbolic as well as arbitrary-precision numerical computations. The system has a library of scripts that implement many of the symbolic algebra operations; new algorithms can be easily added to the library. YACAS comes with extensive documentation (hundreds of pages) covering the scripting language, the functionality that is already implemented in the system, and the algorithms used.