You can define your own formulars with up to 4 parameters and assign it to one of up to 28 user-defined buttons.
You can also define your own constants.
The function calculator is able to derivate a function like 2x^2 + sin(2x) to 4x + 2*cos(2x) and to simplify expressions (e.g. (x+1)(x-1) --> x^2-1).
In the plotter-view, you can plot an unlimitted count of functions like f(x)=sin(x)*x. You can select the range of the x- and y-axix from -99 to 99. You can zoom in, zoom out and change the plotted region in the view which shows the plotted functions dynamically. You can also plot f(y)-functions, f(x,y)-functions, 3D-functions, f(n)-sequences, f(t)-functions (e.g. zycloide), and mandelbrot and julia.
In the matrix calculator (real-numbers and complex-numbers), you can dynamically give in 2 matrixes and multiplicate them or make an addition or subtraction. Furthermore, you can calculate the determinante, the inverse and transponent of a matrix. For linear equality systems, the gauss-algorithm is available. You can also calculate the rank of a matrix.

Update Description:
Countless improovements like:
- Simplifying expressions
- Complex-calculator (sin, cos, tan, asin, acos, atan, pow, abs on complex numbers)
- Matrix-calculator: determinante and inverse on complex matrixes
- History over your expressions
- Undo your last action
- Specify calculation mode (precision, floting or scientific or engineering mode).