iPhone Giveaway of the Day - Symbolic Calculator HD

With full-featured algebra capabilites on par with high-end scientific calculators this applications lets you perform all kind of different operations from the simplest multiplications to computing the integrals of the most complicated functions. (see the screenshots for examples!)

Ideal for high-school or college students, also useful for engineers or anyone dealing with a lot of math.

Even if you are using just a fraction of the functionalities, the iphone-ish, easy-to-use interface makes life much easier compared to traditional calculators.

Features overview:

- Exact arithmetic. 5/15 is 1/3 and not 0.333 (unless you select rounded numerical mode)
- Extensive algebra and calculus capabilities.
- Formulas displayed in "natural" form
- History, storing results in an easy-to-use way
- Unlimited number of variables, user-defined functions
- Session management
- Plotting
- in-app help

Some of the more interesting algebraic capabilities:

- Simplifying or expanding expressions
- Solving equations, systems, differential equations, numerically or symbolically
- Integrals, derivatives, limits, taylor series, etc for function analysis
- Full support for complex numbers
- Vectors, matrices, linear algebra functions
- ... and many other things

User feedback is always welcome!