i cannot seem to enter :y=(a.^(4x​)+a.^(-4x)​-22)/(x^3)

im trying to plot this graph

 clf
hold on
axis ([-100 100  -100 100])
x=-1:0.02:70;
a=14
y=(a.^(4x)+a.^(-4x)-22)/(x^3)

however whenever i try to enter this command:

y=(a.^(4x)+a.^(-4x)-22)/(x^3)

i get this error:

??? Error using ==> mpower
Matrix must be square.

can i know what is wrong with my command?

Answer 1

[Azzi Abdelmalek]

y=(a.^(4*x)+a.^(-4*x)-22)./(x.^3)

[Austin]

noted.thanks a lot!