Check out the comparative of the leading products in the market of educational Mathematics.

And if you are the incredulous type, just see it for yourself in the examples below...

User experience	Learning curve
	General usability
	User input usability
	Help manual	N/A
Data types	Numbers
	Lists, sets and sequences
	Functions
	Geometric objects
	Statistics objects
Symbolic calculation	Algebra
	Matrix and vector algebra
	Calculus:differentiate, integrate, limits
	Power of solve command
	Automatic solve switch (numeric, ODE...)
	Logic and set operations
	Combinatorics and statistics
	Geometry
	Overall speed
Graphics	Interactive graphics
	Colour graphics
	Function representation
	Geometric object representation
	3D
	Configurability of graphics
Technical	Extensibility via programming
	Internet oriented
	Language support
	Windows
	Linux
	Mac

 where:

Legend
	Outstanding
	Good / Yes
	Acceptable
	Poor / No