Issue With Integration Output

I'm thinking this is a basic problem, but can't find an answer anywhere and have been unable to resolve it myself :/

When I integrate it always gives the output as an equation rather then an actual number. The equation it outputs can be put back into matlab and it'll give an actual answer but for the life of me I can't work out how to make it do this straight away.

For example the following;

syms x;
a=int((x^4), x, 2, 0)

Gives the output;

b =

-32/5

But I want it to give the output;

b =

     -6.4000

How do I do this? I'm sure it's something simple but just can't work out (or find) how to do it :(

Answer 1

[Andrei Bobrov]

out = vpa(a,5)  % sym class
out = double(a) % double class
out = eval(a)   % double class