Hello to everyone

I have tried to solve This integral and untill here maple is unable to do it.

-2/3 + int(sqrt(x)/(exp((x-y)/tau ) + 1), x=0..infinity);

any idea? 
And thanks for your support

Hello to anyone, 

i am trying to change the valué of x downwards in to the matrix of the next code, but my loop is failing. 
 

n:=5

R:=Matrix(5,n):

for i from 1 to n do 

R[..,i]:=(sin(i*x));

end do:

R;

Untill here all okay, but the next loop is the problem

for i from 1 to 5 do

i:=i

x:=i

R[i,..] := sin(x));

end do:

R;

Thanks for your kind help 

Hello every one, i am New using maple and I am trying to translate This code from matemática to maple, someone can help me please?