I am trying to evaluate the following summation which gives the result 0. But I think answer is not correct.
 

Download zero.mw

I am trying to evaluate the following triple integral but it takes much time so i kill the job.

Download int_maple_prime2.mw

I am trying to evaluate the following function for which I am getting a result 0. I just need to make sure the approach as well as result is correct or not. Thanks in advance. 
 

Download int(maple_prime).mw

I am interested to know difference between eval and evalf. Will evaluating a function at a point using these commands gives the same answer or not. I mean will there will be any exception or not. How can I evaluate the value of  a series using eval instead of evalf without the problem of memory running out (No comprimise in accuracy).

I have installed maple in my 64 bit linux and on running calculation a window pop up saying kernel connection not available. I have disabled my firewall still the problem persist. The window freezes on clicking menu. Thankz in advance.