GraphNCalc83 funktioniert nicht

Math functions: Trigonometry, logarithms, function minimum, maximum, numeric integration and derivatives, general solver, real and imaginary numbers, combination, permutation, random number generation, normal, T, chi squared, Fisher, poisson and geometric distributions, binary shift and rotate, test and logic operations, list operations including sort, std. deviation, sum, sequence, matrix determinant, transpose, sum, ref, rref, addition, multiplication.  Graph functions, parametric, f(x,y) and polar equations and statistics plots: Full color graphs with touch to trace, pinch zoom, function minimum, maximum, intersections, asymptotes and numeric integration.  The touch interface allows you to view and interact with the periodic table to view by series, state, melting point, boiling point, electronegativity, electron affinity, valence, ionization, radius, hardness, modulus, density, conductivity, heat and year discovered.  The familiar calculator keyboard, arrow keys and functions are enhanced with full touch input for all graphs, editors and menus.  The command line editor includes interactive parenthesis matching and high lighting, undo and redo, bubble function help and a 200 level calculation history and recall stack.  The regression analysis screen allows you to quickly compute, view and analyze a data set using a variety of curve fitting methods.  Chemistry: The calculator includes a full featured periodic table, a mass calculator and a data base of element properties.  Matrix and Lists: Matrix and list editors and a full set of matrix and list operations are built in.  Written using the latest 64 bit math libraries, diese App harnesses the amazing computing resources of the iPhone and iPad to provide a colorful, fast and fluid experience.  Algebraic entry: Enter problems using full algebraic textbook notation.  Generate a PDF report of calculations for mailing or printing using the SEND function.  Geometry: The geometry application computes perimeter and area for a variety of 2d geometric figures including squares, rectangles, parallelograms, triangles, polygons, circles, arcs and ellipses.  Matrix, statistics and BASIC programs run 500x times faster than traditional calculators.  Interactively explore function behavior using variables tied to slider bars.  Built-in user guide: A user guide is included and is a touch away using the ? key or ⓘ on any menu.  Scroll through the list, matrix and calculation history with a swipe. Tap the ? key for help.