how to write matlab code for the equation

[Rik]

Why don't you try something yourself first? I would recommend writing parts of your equation as separate functions and combining them like this:

%instead of y=@(x) x.^2 + sqrt(sin(x.^3))
part1=@(x) x.^2;
part2=@(x) sqrt(sin(x*part1(x)));
y=@(x) part1(x) + part2(x);

[DGM]

It might be worth asking if you intend to do this numerically or symbolically.

[NAGA LAKSHMI KALYANI MOVVA]

symbolically

[Rik]

Then start by declaring your variables as symbolic variables and start typing. You can still use my suggestion to minimize the risk of typos.