ISymAlgebra app for iPhone and iPad

ISymAlgebra is a powerful Symbolic Calculator ans advanced C.A.S. with an revolutionary Formulas Editor : Keyboards are scrollable.
You can edit formulas without knowing commands or edit lines and lines.
You can solve equations or calculate expressions with few clicks.

Features :
Exact arithmetics and numeric approssimations
Expressions with number,symbols and variables
Complex numbers
Expansion and reduction of trigonometric formulas
Derivative
Indefinite Integrals
Definite Integrals with evaluation simbolic and numerical
Equations
Limits
Taylor series

Demo and tutorial available on youtube (find isymalgebra )

Tutorial 1 - ISymAlgebra as a scientific calculator
http://www.youtube.com/watch?v=Ri8C5SINVMM

Tutorial 2 - Scrollable keyboards
Tutorial 3 - simple expressions
Tutorial 4 - solve equations
Tutorial 5 - derivative with iphone
Tutorial 6 - integrals with iphone
Tutorial 7 - trigonometric expressions