Calculating derivative of a function

a=62;

b=95;

y = @(x) (3*x.^2.*sin(a*x))./(x.^2+b);

dy = diff(y)

I don't know exactly how i need to calculate the derivative correctly.

Answer 1

[KSSV]

syms x
a=62;
b=95;
y = (3*x.^2.*sin(a*x))./(x.^2+b);
dy = diff(y)

Answer 2

[Torsten]

syms a b x
y = (3*x^2*sin(a*x))/(x^2+b);
dy = diff(y,x)

Best wishes

Torsten.