use the casio.fig and casio.m as a base and add two or more math functions to the calculator I am trying to add the x^3

[answerhappygod]

use the casio.fig and casio.m
as a base and add two or more math functions to the
calculator
I am trying to add the x^3 and x^4 buttons to the calculator but
it is not working. I was able to add the push buttons they are just
not working. Every other preexisting button works though. Here is
the code...
function cubed_Callback(~, ~, handles)
a=get(handles.edit1,'string');
a=a(:,a:length (a)*a*a);
set(handles.edit1,'string',strcat(a,'x^3'));