Microsoft Mathematics (formerly Microsoft Math) is a freely downloadable educational program, designed for Microsoft Windows, that allows users to solve math and science problems. Developed and maintained by Microsoft, it is primarily targeted at students as a learning tool.
http://en.wikipedia.org/wiki/Microsoft_Mathematics (text description)
http://www.microsoft.com/en-us/download/details.aspx?id=15702 (download)
Galway Maths Grinds 